Boxing Day

[+1]: Add {R} or {G}. If that mana is spent on a creature spell, it gains riot. (It enters the battlefield with your choice of a +1/+1 counter or h...

Each creature you control with a +1/+1 counter on it has "{T}: Add one mana of any color." [-1]: Put a +1/+1 counter on target creature.

Each creature you control with a +1/+1 counter on it has "{T}: Add one mana of any color." [-1]: Put a +1/+1 counter on target creature.

[+1]: Untap target land you control. Until your next turn, it becomes a 5/5 Elemental creature with haste. It's still a land. [-3]: Return target ...

[+1]: Each opponent discards a card and loses 2 life. [-3]: Gain control of target creature until end of turn. Untap it. It gains haste until end o...

Each creature you control that's a Wolf or a Werewolf enters the battlefield with an additional +1/+1 counter on it. [-2]: Create a 2/2 green Wolf...

Each creature you control that's a Wolf or a Werewolf enters the battlefield with an additional +1/+1 counter on it. [-2]: Create a 2/2 green Wolf...

[+1]: Until your next turn, prevent all damage that would be dealt to and dealt by target permanent an opponent controls. [-1]: Draw a card. You m...

Your opponents can't gain life. [-2]: Create a 1/1 red Devil creature token with "When this creature dies, it deals 1 damage to any target."

[+1]: Distribute three +1/+1 counters among one, two, or three target creatures you control. [+1]: Look at the top four cards of your library. You ...

[+1]: Up to one target creature gains double strike until end of turn. [-2]: Samut, the Tested deals 2 damage divided as you choose among one or tw...

Whenever a creature attacks you or a planeswalker you control, each Dragon you control deals 1 damage to that creature. [+1]: Until end of turn, ea...

Whenever a creature attacks you or a planeswalker you control, each Dragon you control deals 1 damage to that creature. [+1]: Until end of turn, ea...

If another red source you control would deal damage to a permanent or player, it deals that much damage plus 1 to that permanent or player instead....

[+1]: Discard your hand, then exile the top three cards of your library. Until end of turn, you may play cards exiled this way. [+1]: Chandra, Hear...

[+1]: Chandra, Pyromaster deals 1 damage to target player or planeswalker and 1 damage to up to one target creature that player or that planeswalke...

[+1]: Add {R}{R}{R}. Spend this mana only to cast instant or sorcery spells. [+1]: Discard up to three cards, then draw that many cards. [-8]: Yo...

[+1]: Chandra, Pyromaster deals 1 damage to target player or planeswalker and 1 damage to up to one target creature that player or that planeswalke...

As long as it's your turn, Gideon Blackblade is a 4/4 Human Soldier creature with indestructible that's still a planeswalker. Prevent all damage t...

[+1]: Put a loyalty counter on Gideon, Champion of Justice for each creature target opponent controls. [0]: Until end of turn, Gideon, Champion of...

As long as it's your turn, Gideon Blackblade is a 4/4 Human Soldier creature with indestructible that's still a planeswalker. Prevent all damage t...

[+1]: Elementals you control get +2/+0 until end of turn. [-1]: Add {R}{R}. [-2]: Chandra, Novice Pyromancer deals 2 damage to any target.

This spell can't be countered. [+2]: Each opponent gets an emblem with "At the beginning of your upkeep, this emblem deals 1 damage to you." [-3]...

[+2]: Reveal the top three cards of your library. Put all nonland permanent cards revealed this way into your hand and the rest on the bottom of yo...