Search your library for a basic land card, put that card onto the battlefield, then shuffle.

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

Defender (This creature can't attack.)
: This creature gets +1/+0 until end of turn.

Defender, flying (This creature can't attack, and it can block creatures with flying.)

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.)

Enchant artifact
As long as enchanted artifact isn't a creature, it's an artifact creature with power and toughness each equal to its mana value.

Trample
During your turn, Angry Mob's power and toughness are each equal to 2 plus the number of Swamps your opponents control. During turns other than yours, Angry Mob's power and toughness are each 2.

Attacking creatures you control get +1/+0.

Prevent all damage that would be dealt to this creature by creatures.

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

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

As this artifact enters, choose an opponent.
The chosen player's maximum hand size is four.

, : This artifact deals 1 damage to any target.

Untapped creatures you control get +0/+2.

Enchant creature
Enchanted creature gets +3/+3.

At the beginning of each end step, put a corpse counter on this creature for each creature that died this turn.
Remove a corpse counter from this creature: Regenerate this creature.

Flying
: This creature gets +1/+0 until end of turn. If this ability has been activated four or more times this turn, sacrifice this creature at the beginning of the next end step.

: Target creature you control with toughness less than this creature's power gains flying until end of turn. Destroy that creature at the beginning of the next end step.

, : Target creature with power 2 or less can't be blocked this turn.

Defender (This creature can't attack.)
Flying

Keldon Warlord's power and toughness are each equal to the number of non-Wall creatures you control.

Destroy all Islands.

Destroy all Plains.

Artifacts, creatures, and lands your opponents control enter tapped.

At the beginning of your upkeep, sacrifice this enchantment unless you pay .
All Mountains are Plains.

Enchant artifact
You control enchanted artifact.

: Target creature loses flying until end of turn.

Flying

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

, : Prevent the next 2 damage that would be dealt to you this turn.

At the beginning of each player's upkeep, this enchantment deals damage to that player equal to the number of Swamps they control.

Enchant creature
You control enchanted creature.

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

Flying
: Regenerate this creature.

Pyrotechnics deals 4 damage divided as you choose among any number of targets.