Boxing Day

Counter target spell unless its controller pays {X}, where X is its mana value.

Whenever one or more creatures attack you, if this creature is untapped, you may untap all creatures you control.

{T}: Choose a color. Add one mana of that color unless any player pays {1}. Activate only as an instant.

{1}: Any player may pay {1}. If no one does, the next time a source of your choice would deal damage to you this turn, prevent that damage.

{U}: Tap target creature unless its controller pays {1}.

Rhystic Lightning deals 4 damage to any target unless that permanent's controller or that player pays {2}. If they do, Rhystic Lightning deals 2 da...

Draw three cards. Then if any player pays {2}, discard three cards.

Creatures you control get +0/+1 until end of turn. They get an additional +0/+2 until end of turn unless any player pays {2}.

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

Unless target player pays {3}, that player loses 5 life and you gain 5 life.

Unless any player pays {2}, search your library for a card, put that card into your hand, then shuffle.

Reach (This creature can block creatures with flying.)

Flying {2}: This creature loses flying until end of turn. Any player may activate this ability.

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

Mercenaries don't untap during their controllers' untap steps.

{2}: Prevent the next 1 damage that would be dealt to target creature this turn. Any player may activate this ability.

This creature gets +3/+3 as long as you control no untapped lands.

Reorder your graveyard at random. An opponent chooses a card at random in your graveyard. If it's a creature card, put it onto the battlefield. Oth...

Searing Wind deals 10 damage to any target.

Basic lands each player controls have shroud as long as that player controls three or fewer lands. (They can't be the targets of spells or abilities.)

{2}{W}: The next time target attacking creature would deal combat damage to this creature this turn, that creature deals that damage to itself inst...

Whenever this creature attacks, defending player may pay {4}. If that player doesn't, this creature can't be blocked this turn.

When this creature enters, tap all lands you control.

You may discard a Forest card rather than pay this spell's mana cost. Prevent all combat damage that would be dealt by unblocked creatures this turn.