Boxing Day

Time Lord's Prerogative — Whenever you cast a historic spell, copy it, except the copy isn't legendary. This ability triggers only once each turn. ...

Flying When this creature leaves the battlefield, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")

Partner with Amy Pond First strike, lifelink The Last Centurion — When you cast this spell from anywhere other than exile, exile it with three time...

Menace (This creature can't be blocked except by two or more creatures.) Rhinos you control have menace. Swampcycling {2} ({2}, Discard this card: ...

Meet in Reverse — You draw cards from the bottom of your library rather than the top. Spoilers — Whenever an opponent scries, surveils, or searches...

Flying When Stockman enters, draw a card, then discard a card. Islandcycling {2} ({2}, Discard this card: Search your library for an Island card, r...

Flash When Renet enters, return each other nonland permanent that entered this turn to its owner's hand.

Flying, vigilance Alliance — Whenever another creature you control enters, this creature gets +1/+0 until end of turn.

When Metalhead enters, return up to one other target artifact or creature to its owner's hand. {R}, Sacrifice another artifact: Put a +1/+1 counter...

Vanishing 3 Imprint — When Idris enters, exile another artifact you control until Idris leaves the battlefield. Idris has all activated and trigger...

This creature can't be blocked if an artifact entered the battlefield under your control this turn. {U}, Sacrifice this creature: Counter target sp...

Nitro-9 — Whenever Ace attacks, you may sacrifice an artifact. When you do, put a +1/+1 counter on Ace, then it fights up to one target creature de...

Flying Whenever an artifact you control enters, put a +1/+1 counter on Donatello.

Whenever you cast an instant or sorcery spell that targets only Bill Potts or activate an ability that targets only Bill Potts, copy that spell or ...

When Donatello enters, if you control an artifact, draw a card.

When this creature enters, create a Mutagen token. (It's an artifact with "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. ...

Flying, haste Consume Anomaly — Whenever this creature deals combat damage to a player, put target face-up card they own in exile on the bottom of ...

When this creature enters, create a Mutagen token. (It's an artifact with "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. ...

Flying, vigilance When this creature dies, draw a card.

Whenever April deals combat damage to a player, draw that many cards, then discard a card.

Whenever April deals combat damage to a player, draw that many cards, then discard a card.

When Casey Jones enters, draw three cards. At the beginning of your next upkeep, discard three cards at random.

Science Teacher — Each Saga spell you cast has replicate. The replicate cost is equal to its mana cost. (When you cast that Saga, copy it for each ...

Trample Activated abilities of artifact tokens you control cost {1} less to activate. When Mutagen Man enters, create X Mutagen tokens. (They're ar...