Sacrifice a creature: Add .

Untap target attacking creature. Prevent all combat damage that would be dealt to and dealt by that creature this turn.
Draw a card at the beginning of the next turn's upkeep.

Destroy target land.

First strike

Enchant creature
All creatures able to block enchanted creature do so.

Whenever this creature attacks, it gets +1/-2 until end of turn.
, : Target creature gains mountainwalk until end of turn. (It can't be blocked as long as defending player controls a Mountain.)

: Target land becomes a Swamp until its controller's next untap step.

Attacking creatures get +1/+0 and gain trample until end of turn.

: Until your next upkeep, target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value.

Whenever this creature deals damage to a player, that player gets a poison counter. (A player with ten or more poison counters loses the game.)

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

, : Target opponent reveals their hand and discards a creature card at random. Activate only during your turn.

Attacking creatures you control get +1/+0.

Flying
, : This creature deals 1 damage to target attacking or blocking creature.

Reach (This creature can block creatures with flying.)

: Target creature loses flying until end of turn.

You and target player exchange control of the creature you each control with the greatest mana value. Then exchange control of artifacts the same way. If two or more permanents a player controls are tied for greatest, their controller chooses one of them.

Destroy all Islands.

Whenever a land is put into a graveyard from the battlefield, this artifact deals 2 damage to that land's controller.

Flying
At the beginning of your upkeep, sacrifice this creature unless you pay .

, : Draw a card.

At the beginning of your upkeep, put a time counter on this artifact.
, , Sacrifice this artifact: This artifact deals damage equal to the number of time counters on it to each creature and each player.

As this creature enters, it becomes your choice of a 3/3 artifact creature, a 2/2 artifact creature with flying, or a 1/6 Wall artifact creature with defender in addition to its other types. (A creature with defender can't attack.)

, : This artifact deals 1 damage to any target.

, : You may tap or untap target artifact, creature, or land.

: This creature gets +1/+1 until end of turn.

Flying
Whenever this creature deals damage to a player, that player discards a card.

Enchant artifact
You control enchanted artifact.

: Regenerate this creature.

At the beginning of your upkeep, sacrifice this enchantment unless you pay .
At the beginning of your end step, create a 0/1 black Thrull creature token.

Whenever this creature is dealt damage, put a +1/+1 counter on it.

Enchant land
At the beginning of the upkeep of enchanted land's controller, this Aura deals 1 damage to that player.

Destroy all Plains.