Meet in Reverse — You draw cards from the bottom of your library rather than the top.

Spoilers — Whenever an opponent scries, surveils, or searches their library, put a +1/+1 counter on River Song. Then River Song deals damage to that player equal to its power.

At the beginning of your end step, each player exiles the top card of their library. Until your next end step, each player may play the card they exiled this way.

Whenever a player plays a land from exile or casts a spell from exile, you put a +1/+1 counter on target creature and create a Food token. (It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")

First strike, menace, trample

Partner (You can have two commanders if both have partner.)

Whenever you cast a legendary spell, untap Rona, Herald of Invasion.

: Draw a card, then discard a card.

: Transform Rona. Activate only as a sorcery. ( can be paid with either or 2 life.)

, Return Rootha, Mercurial Artist to its owner's hand: Copy target instant or sorcery spell you control. You may choose new targets for the copy.

Rose Tyler gets +1/+1 for each time counter on it.

Bad Wolf — Whenever Rose Tyler attacks, put a time counter on it for each suspended card you own and each other permanent you control with a time counter on it.

Doctor's companion (You can have two commanders if the other is the Doctor.)

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)

Heroic — Whenever you cast a spell that targets Rosnakht, Heir of Rohgahh, create a 0/1 red Kobold creature token named Kobolds of Kher Keep.

Haste

Whenever Ruby, Daring Tracker attacks while you control a creature with power 4 or greater, Ruby gets +2/+2 until end of turn.

: Add or .

When you have 30 or more life, flip Rune-Tail, Kitsune Ascendant.

Flying

When Runo Stromkirk enters the battlefield, put up to one target creature card from your graveyard on top of your library.

At the beginning of your upkeep, look at the top card of your library. You may reveal that card. If a creature card with mana value 6 or greater is revealed this way, transform Runo Stromkirk.

Menace

At the beginning of your end step, if you have the initiative, create a Treasure token. Create three of those tokens instead if you've completed a dungeon.

Choose a Background (You can have a Background as a second commander.)

, : Create a token that's a copy of another target creature or artifact you control, except it's an artifact in addition to its other types. It gains haste. Sacrifice it at the beginning of the next end step.

Whenever Saint Traft and Rem Karolus becomes tapped, create a 1/1 red Human creature token if this is the first time this ability has resolved this turn. If it's the second time, create a 1/1 blue Spirit creature token with flying. If it's the third time, create a 4/4 white Angel creature token with flying.

Whenever you cast a spell that has convoke, untap Saint Traft and Rem Karolus.

First strike, vigilance, haste

Whenever a creature you control deals combat damage to a player, if that creature entered the battlefield this turn, draw a card.

Flash

When Samwise the Stouthearted enters the battlefield, choose up to one target permanent card in your graveyard that was put there from the battlefield this turn. Return it to your hand. Then the Ring tempts you.

Whenever you cast a historic spell, investigate. This ability triggers only once each turn. (Artifacts, legendaries, and Sagas are historic. To investigate, create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Doctor's companion (You can have two commanders if the other is the Doctor.)

Whenever a permanent an opponent controls is put into a graveyard from the battlefield, put a +1/+1 counter on Sarulf, Realm Eater.

At the beginning of your upkeep, if Sarulf has one or more +1/+1 counters on it, you may remove all of them. If you do, exile each other nonland permanent with mana value less than or equal to the number of counters removed this way.

Whenever a land you control is tapped for mana, add an additional one mana of any type that land produced for each other land you control with the same name as it.

Menace

Whenever Satoru, the Infiltrator and/or one or more other nontoken creatures enter the battlefield under your control, if none of them were cast or no mana was spent to cast them, draw a card.

Remove a ki counter from Scarmaker: Target creature gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Whenever one or more creature cards are put into your graveyard from anywhere, venture into the dungeon. This ability triggers only once each turn. (To venture into the dungeon, enter the first room or advance to the next room.)

Create Undead — Whenever you complete a dungeon, return target creature card from your graveyard to the battlefield.

Whenever another creature enters the battlefield, its controller may draw a card if its power is greater than each other creature's power.

, : Add X mana in any combination of colors, where X is the greatest power among creatures you control.

Trample, haste

Share Intelligence — Whenever Sergeant John Benton deals combat damage to a player, you and that player each draw that many cards.

Flying, vigilance

: Put a +1/+1 counter on each creature that entered the battlefield under your control this turn.

Shanna, Sisay's Legacy can't be the target of abilities your opponents control.

Shanna gets +1/+1 for each creature you control.

, , Return Shigeki, Jukai Visionary to its owner's hand: Reveal the top four cards of your library. You may put a land card from among them onto the battlefield tapped. Put the rest into your graveyard.

Channel — , Discard Shigeki: Return X target nonlegendary cards from your graveyard to your hand.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Whenever you cast a noncreature spell, you may pay . If you do, target creature gains double strike until end of turn.

Deathtouch

Whenever Silas Renn, Seeker Adept deals combat damage to a player, choose target artifact card in your graveyard. You may cast that card this turn.

Partner (You can have two commanders if both have partner.)

Sisay, Weatherlight Captain gets +1/+1 for each color among other legendary permanents you control.

: Search your library for a legendary permanent card with mana value less than Sisay's power, put that card onto the battlefield, then shuffle.

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)

Skrelv, Defector Mite can't block.

, : Choose a color. Another target creature you control gains toxic 1 and hexproof from that color until end of turn. It can't be blocked by creatures of that color this turn. ( can be paid with either or 2 life.)

Whenever Slimefoot and Squee enters the battlefield or attacks, create a 1/1 green Saproling creature token.

, Sacrifice a Saproling: Return Slimefoot and Squee and up to one other target creature card from your graveyard to the battlefield. Activate only as a sorcery.

Sacrifice an artifact: Target artifact gains indestructible until end of turn.

Trample

Whenever a land card is put into your graveyard from anywhere, put a +1/+1 counter on Slogurk, the Overslime.

Remove three +1/+1 counters from Slogurk: Return it to its owner's hand.

When Slogurk leaves the battlefield, return up to three target land cards from your graveyard to your hand.

Bird creatures get +1/+1.

: Target Bird creature gains banding until end of turn. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding a player controls are blocking or being blocked by a creature, that player divides that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

Haste

Whenever Squee, Dubious Monarch attacks, create a 1/1 red Goblin creature token that's tapped and attacking.

You may cast Squee, Dubious Monarch from your graveyard by paying and exiling four other cards from your graveyard rather than paying its mana cost.

You may cast Squee, the Immortal from your graveyard or from exile.

At the beginning of each opponent's upkeep, that player loses 1 life for each card fewer than three in their hand.

Whenever you cast your second spell each turn, exile the top card of your library. Until the end of your next turn, you may play that card.

: Copy target instant or sorcery spell you control. You may choose new targets for the copy. Activate only if you've cast three or more spells this turn.

When Student of Elements has flying, flip it.

If you would planeswalk, instead look at the top two cards of your planar deck, put one on the bottom of your planar deck and the other on top, then planeswalk.

: Add .

Doctor's companion (You can have two commanders if the other is the Doctor.)

Svyelun of Sea and Sky has indestructible as long as you control at least two other Merfolk.

Whenever Svyelun attacks, draw a card.

Other Merfolk you control have ward . (Whenever another Merfolk you control becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)

At the beginning of each end step, if an opponent lost 3 or more life this turn, you may draw a card. (Damage causes loss of life.)

Partner with Khorvath Brightflame (When this creature enters the battlefield, target player may put Khorvath into their hand from their library, then shuffle.)

Double strike

Dragons your team controls have double strike.

Syr Ginger, the Meal Ender has trample, hexproof, and haste as long as an opponent controls a planeswalker.

Whenever another artifact you control is put into a graveyard from the battlefield, put a +1/+1 counter on Syr Ginger and scry 1.

, , Sacrifice Syr Ginger: You gain life equal to its power.

Flying

Taborax, Hope's Demise has lifelink as long as it has five or more +1/+1 counters on it.

Whenever another nontoken creature you control dies, put a +1/+1 counter on Taborax. If that creature was a Cleric, you may draw a card. If you do, you lose 1 life.

Investigate. You may play an additional land this turn. (Then exile this card. You may cast the creature later from exile.)

Whenever one or more noncreature permanents are returned to hand, draw a card. This ability triggers only once each turn.

, Return a land you control to its owner's hand: Return target artifact or enchantment card with mana value X or less from your graveyard to the battlefield. Activate only as a sorcery.

Vigilance

Whenever Taranika, Akroan Veteran attacks, untap another target creature you control. Until end of turn, that creature has base power and toughness 4/4 and gains indestructible.

Whenever you cast an enchantment spell, if you don't control a creature named Keimi, create Keimi, a legendary 3/3 black and green Frog creature token with "Whenever you cast an enchantment spell, each opponent loses 1 life and you gain 1 life."

: Tatsunari, Toad Rider and target Frog you control can't be blocked this turn except by creatures with flying or reach.

, : Create a token that's a copy of up to one target artifact token you control. Mill two cards.

, , Sacrifice two artifact tokens, Exile an artifact or creature card from your graveyard: Create a token that's a copy of the exiled card, except it's an artifact in addition to its other types. Activate only as a sorcery.