Boxing Day

Creatures with power greater than the number of cards in your hand can't attack.

Create X 1/1 green Elf Warrior creature tokens, where X is the number of attacking creatures. Prevent all combat damage that would be dealt this tu...

Whenever a nonartifact permanent enters the battlefield under your control, you may return another permanent you control that shares a permanent ty...

This spell costs {X} less to cast, where X is the greatest power among creatures you control. {T}: Add {G}{G}. You gain 2 life. Whenever a nontoken...

Each land is a Forest in addition to its other land types.

Each land is a Forest in addition to its other land types.

{T}: Add {C}. {T}, Sacrifice Wasteland: Destroy target nonbasic land.

{T}: Add {C}. {T}, Sacrifice Wasteland: Destroy target nonbasic land.

Each land is a Swamp in addition to its other land types.

Each land is a Swamp in addition to its other land types.

{T}: Add {R}. {R}, {T}: Target legendary creature gains first strike until end of turn.

{T}: Add {R}. {R}, {T}: Target legendary creature gains first strike until end of turn.

{T}: Add one mana of any type that a land you control could produce.

{T}: Add one mana of any type that a land you control could produce.

{T}: Add one mana of any color. Spend this mana only to cast a multicolored spell.

{T}: Add one mana of any color. Spend this mana only to cast a multicolored spell.

{T}: Add {U}. {1}: Return Oboro, Palace in the Clouds to its owner's hand.

{T}: Add {U}. {1}: Return Oboro, Palace in the Clouds to its owner's hand.

{T}: Add {C}. {4}{S}, {T}, Sacrifice Mouth of Ronom: It deals 4 damage to target creature. ({S} can be paid with one mana from a snow source.)

Devour Food 3 (As this enters the battlefield, you may sacrifice any number of Foods. This creature enters the battlefield with three times that ma...

{T}: Add {U}. {U}, {T}: Untap target legendary permanent.

{T}: Add {C}. {1}{W}, {T}: Prevent all combat damage that would be dealt by target attacking creature this turn.

{T}, Pay 1 life: Add {G} or {W}. {1}, {T}, Sacrifice Horizon Canopy: Draw a card.

{T}: Add {C}. {T}: Each player gains control of all creatures they own.