Boxing Day

Mutate {3}{R} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on...

{B}: Prakhata Pillar-Bug gains lifelink until end of turn. (Damage dealt by this creature also causes you to gain that much life.)

Deathtouch Cycling {2}{B} ({2}{B}, Discard this card: Draw a card.) When you cycle Void Beckoner, put a deathtouch counter on target creature you c...

{T}: Target player mills a card. (They put the top card of their library into their graveyard.) {5}, {T}, Sacrifice Codex Shredder: Return target c...

Mutate {2}{W} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on...

Whenever a nontoken creature you control dies, you gain 1 life. Then you may draw a card. If you do, discard a card. {2}, {T}, Sacrifice Gate to t...

Prevent all noncombat damage that would be dealt to you and other permanents you control. [-2]: Exile target creature with power 4 or greater.

Morph {5} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

{T}, Sacrifice Tragic Poet: Return target enchantment card from your graveyard to your hand.

If a source would deal damage to equipped creature, prevent 2 of that damage. Equip {1}

Shield Mare can't be blocked by red creatures. When Shield Mare enters the battlefield or becomes the target of a spell or ability an opponent con...

Return target creature card with mana value 3 or less from your graveyard to the battlefield.

Flying

Defender {7}: Roving Keep gets +2/+0 and gains trample until end of turn. It can attack this turn as though it didn't have defender.

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) Return target nonland permanent to its owner...

Defender (This creature can't attack.)

Defender {2}{U}, {T}: Target player mills X cards, where X is the number of creatures with defender you control.

Switch the power and toughness of each of up to two target creatures until end of turn.

When Totem-Guide Hartebeest enters the battlefield, you may search your library for an Aura card, reveal it, put it into your hand, then shuffle.

Counter target activated or triggered ability. (Mana abilities can't be targeted.)

First strike

Other Dinosaurs you control have haste. When Regisaur Alpha enters the battlefield, create a 3/3 green Dinosaur creature token with trample.

Return target nonland permanent to its owner's hand. Draw a card.

{T}: Mill two cards. {2}, Exile Perpetual Timepiece: Shuffle any number of target cards from your graveyard into your library.