Menace

When Riveteers Provocateur enters the battlefield, choose a creature card in your hand without blitz. It perpetually gains blitz. The blitz cost is equal to its mana cost.

Blitz (If you cast this spell for its blitz cost, it gains haste and "When this creature dies, draw a card." Sacrifice it at the beginning of the next end step.)

Flying, deathtouch, lifelink

Whenever you gain life, Rodolf Duskbringer gains indestructible until end of turn.

At the beginning of your end step, you may pay . When you do, return target creature card with mana value X or less from your graveyard to the battlefield, where X is the amount of life you gained this turn.

Other Kobolds you control get +2/+2.

Whenever you cast a Kobold spell, you may pay . If you do, create a 4/4 red Dragon creature token with flying.

Whenever you cast a Dragon spell, create a 0/1 red Kobold creature token named Kobolds of Kher Keep.

When Rona, Disciple of Gix enters the battlefield, you may exile target historic card from your graveyard. (Artifacts, legendaries, and Sagas are historic.)

You may cast spells from among cards exiled with Rona.

, : Exile the top card of your library.

Trample

Whenever a source deals damage to Rona, Tolarian Obliterator, that source's controller exiles a card from their hand at random. If it's a land card, you may put it onto the battlefield under your control. Otherwise, you may cast it without paying its mana cost.

Flash

Flying, lifelink

When Rooftop Assassin enters the battlefield, destroy target creature an opponent controls that was dealt damage this turn.

Rot Farm Skeleton can't block.

, Mill four cards: Return Rot Farm Skeleton from your graveyard to the battlefield. Activate only as a sorcery.

When Rotfeaster Maggot enters the battlefield, exile target creature card from a graveyard. You gain life equal to that card's toughness.

Exploit (When this creature enters the battlefield, you may sacrifice a creature.)

When Rot-Tide Gargantua exploits a creature, each opponent sacrifices a creature.

Whenever Rotting Giant attacks or blocks, sacrifice it unless you exile a card from your graveyard.

At the beginning of your upkeep, discard a card.

Menace

: Spells you cast this turn that are black and/or red cost less to cast, where X is the amount of life you lost this turn. Activate only as a sorcery.

Phalanx Commander — When Royal Warden enters the battlefield, create two tapped 2/2 black Necron Warrior artifact creature tokens.

Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Deathtouch

When Ruin Rat dies, exile target card from an opponent's graveyard.

When Rune-Brand Juggler enters the battlefield, suspect up to one target creature you control. (A suspected creature has menace and can't block.)

, Sacrifice a suspected creature: Target creature gets -5/-5 until end of turn.

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.

Ruthless Cullblade gets +2/+1 as long as an opponent has 10 or less life.

, Sacrifice a creature: Create two Treasure tokens. (They're artifacts with ", Sacrifice this artifact: Add one mana of any color.")

Sacrifice three Treasures: Draw a card.

Squad—Exile four cards from your graveyard. (As an additional cost to cast this spell, you may pay its squad cost any number of times. When this creature enters the battlefield, create that many tokens that are copies of it.)

Menace (This creature can't be blocked except by two or more creatures.)

Whenever you cycle or discard a card, you may pay . If you do, put a -1/-1 counter on target creature.

At the beginning of each player's upkeep, that player sacrifices a non-Elf creature.

Sacrifice a creature: Target player discards two cards. Activate only as a sorcery.

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.)

You may sacrifice three artifacts rather than pay this spell's mana cost.

Exile three artifact cards from your graveyard: Return Salvage Titan from your graveyard to your hand.

Flying

Whenever a creature an opponent controls dies, you may gain 3 life.

Whenever an opponent discards a card, you may gain 3 life.

Lifelink

Blood Chalice — Whenever another creature you control dies, Sanguinary Priest deals 1 damage to any target.

, Sacrifice a creature: Destroy each creature with the same mana value as the sacrificed creature.

Menace, lifelink

, Sacrifice another creature: Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

At the beginning of your end step, if there are five or more mana values among cards in your graveyard, you may pay 2 life. If you do, draw a card.

When Sanity Gnawers enters the battlefield, target player discards a card at random.

Exile two cards from your graveyard: Sarcatog gets +1/+1 until end of turn.

Sacrifice an artifact: Sarcatog gets +1/+1 until end of turn.

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 you cast a noncreature spell, amass Orcs X, where X is that spell's mana value. (Put X +1/+1 counters on an Army you control. It's also an Orc. If you don't control an Army, create a 0/0 black Orc Army creature token first.)

Goblins and Orcs you control have ward .

Whenever you activate a ninjutsu ability, look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. This ability triggers only once each turn.

Each creature card in your hand has ninjutsu .

When you cast this spell, amass Orcs 5, mill five cards, then return a creature card from your graveyard to the battlefield.

Trample

Whenever a commander an opponent controls dies, the Ring tempts you.

When Sauron, the Lidless Eye enters the battlefield, gain control of target creature an opponent controls until end of turn. Untap it. It gains haste until end of turn.

: Creatures you control get +2/+0 until end of turn. Each opponent loses 2 life.

Flash

Elite Troops — Sautekh Immortal enters the battlefield with a +1/+1 counter on it for each creature that died this turn.

Whenever you sacrifice a black creature, you may pay 2 life. If you do, each other player sacrifices a creature.

Whenever you sacrifice a green creature, you may gain 2 life.

When Scampire enters the battlefield, you get , then you may put a sticker on a creature card in your graveyard.

: Return target creature card with a sticker on it from your graveyard to the battlefield. That creature gains haste. Exile it at the beginning of the next end step. Activate only as a sorcery.

, Exile an Assassin card from your graveyard: Destroy target creature.

Sacrifice a creature: Put a +1/+1 counter on Scarland Thrinax.

, Exile an Elf card from your graveyard: Scarred Vinebreeder gets +3/+3 until end of turn.

Flying

Whenever another creature dies, you may put a +1/+1 counter on Scavenger Drake.

Flying

When Scavenging Harpy enters the battlefield, exile target card from an opponent's graveyard.

Whenever you proliferate, each opponent loses 2 life and you gain 2 life.

Flying

Whenever you gain life, put a +1/+1 counter on Scion of the Swarm.

Backup 1 (When this creature enters the battlefield, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.)

, Sacrifice this creature: Draw a card.

At the beginning of your upkeep, you lose 2 life if you don't control an Ogre.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)