Vigilance

Whenever this creature attacks while saddled, it gets +2/+2 until end of turn.

Saddle 1 (Tap any number of other creatures you control with total power 1 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)

Target creature's base power perpetually becomes 0.

: Look at the top three cards of your library. You may reveal a permanent card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

When Boareskyr Tollkeeper enters the battlefield, target opponent reveals all creature and land cards in their hand. Choose one of them. That card perpetually gains "This permanent enters the battlefield tapped."

, Roll a d8: Monstrosity X, where X is the result. (If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.)

Berserk — When this creature becomes monstrous, destroy target permanent.

You may exert this creature as it attacks. When you do, it can't be blocked this turn and you scry 1. (An exerted creature won't untap during your next untap step. To scry 1, look at the top card of your library. You may put that card on the bottom.)

Tap target creature. Create a Cursed Role token attached to it. (Enchanted creature is 1/1.)

When this creature enters, if you cast it from your hand, return all permanents to their owners' hands except for Giants, Wizards, and lands.

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.)

Whenever Donna Noble or a creature it's paired with is dealt damage, Donna Noble deals that much damage to target opponent.

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

As long as you control a token, this creature gets +2/+0 and has trample.

Each opponent faces a villainous choice — They exile cards from the top of their library until they exile a nonland card, then you may cast that card without paying its mana cost, or that player exiles the top four cards of their library and Ensnared by the Mara deals damage equal to the total mana value of those exiled cards to that player.

Destroy target creature or enchantment an opponent controls. You lose life equal to that permanent's mana value.

This creature can't block.

Whenever you commit a crime, you may pay . If you do, return this card from your graveyard to the battlefield. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)

Haste

Whenever you cast a noncreature spell, this creature gets +2/+2 until end of turn.

Flash (You may cast this spell any time you could cast an instant.)

Reach

When this creature enters, creatures target player controls get +2/+2 until end of turn. Untap them.

Flying

: This creature gets +1/+0 until end of turn.

Kicker (You may pay an additional as you cast this spell.)

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. If this spell was kicked, sacrifice that creature at the beginning of the next end step.

Reach

Pack tactics — Whenever this creature attacks, if you attacked with creatures with total power 6 or greater this combat, venture into the dungeon. (Enter the first room or advance to the next room.)

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

Lifelink

Whenever a creature an opponent controls dies, you gain 1 life and create a Blood token. (It's an artifact with ", , Discard a card, Sacrifice this token: Draw a card.")

Whenever you cast a noncreature spell, this creature deals 2 damage to each opponent.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

Manifest dread. (Look at the top two cards of your library. Put one onto the battlefield face down as a 2/2 creature and the other into your graveyard. Turn it face up any time for its mana cost if it's a creature card.)

Whenever this creature attacks, if it doesn't have first strike, put a first strike counter on it.

Whenever this creature attacks, if it has first strike, it gains double strike until end of turn.

At the beginning of your upkeep, you draw a card and you lose 1 life.

This creature enters with two +1/+1 counters on it.

When this creature dies, search your library for up to X basic land cards, where X is this creature's power, put them onto the battlefield, then shuffle.

When this creature enters, exile target card with a cycling ability from your graveyard. Until the end of your next turn, you may play that card.

Cycling (, Discard this card: Draw a card.)

This spell costs less to cast if you've gained 3 or more life this turn.

Return up to two target creature cards from your graveyard to your hand.

Menace

Toxic 2 (Players dealt combat damage by this creature also get two poison counters.)

Create a 3/2 red and white Spirit creature token.

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

When this creature exploits a creature, scry 1, then draw a card. (To scry 1, look at the top card of your library, then you may put that card on the bottom.)

Flying

Spells your opponents cast that target this creature cost an additional 3 life to cast.

Whenever another creature you control enters, this creature deals damage equal to that creature's power to any target.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

Water Always Wins — Whenever this creature attacks, put a flood counter on another target creature or land. If it's a creature, it becomes a copy of this creature. If it's a land, it becomes an Island in addition to its other types.

Flying, protection from white and from black

When Ureni enters, it deals X damage divided as you choose among any number of target creatures and/or planeswalkers your opponents control, where X is the number of lands you control.

Deathtouch

Whenever this creature attacks while saddled, it gets +0/+3 until end of turn.

Saddle 2 (Tap any number of other creatures you control with total power 2 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)

: Add one mana of any color.

Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

: Exile the top card of your library. Until your next end step, you may play it.

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