All Swamps are 1/1 black creatures that are still lands.

Flying

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

This artifact enters tapped.
, : Destroy all artifacts, creatures, and enchantments.

Destroy all Islands.

Untapped creatures you control get +0/+2.

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

Trample

You may have this creature enter as a copy of any creature on the battlefield, except it doesn't copy that creature's color and it has "At the beginning of your upkeep, you may have this creature become a copy of target creature, except it doesn't copy that creature's color and it has this ability."

Flying

, : Create a 1/1 colorless Insect artifact creature token with flying named Wasp. (It can't be blocked except by creatures with flying or reach.)

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature.

As long as this creature is untapped, all damage that would be dealt to you by unblocked creatures is dealt to this creature instead.

Flying
Vigilance (Attacking doesn't cause this creature to tap.)

Whenever this creature blocks or becomes blocked by a non-Wall creature, destroy that creature at end of combat.

This creature can't attack unless defending player controls an Island.
: This creature deals 1 damage to any target.
When you control no Islands, sacrifice this creature.

Trample
This creature can block an additional creature each combat.

Flying
Whenever this creature blocks or becomes blocked by a non-Wall creature, destroy that creature at end of combat.

As long as Gaea's Liege isn't attacking, its power and toughness are each equal to the number of Forests you control. As long as Gaea's Liege is attacking, its power and toughness are each equal to the number of Forests defending player controls.
: Target land becomes a Forest until this creature leaves the battlefield.

: The next 1 damage that would be dealt to this creature this turn is dealt to its owner instead. Only this creatures owner may activate this ability.
When this creature dies, its owner loses half their life, rounded up.

Flying
: This creature gets +1/+0 until end of turn.

Flying (This creature can't be blocked except by creatures with flying or reach.)
Nightmare's power and toughness are each equal to the number of Swamps you control.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
At the beginning of your upkeep, this creature deals 8 damage to you unless you pay .

This creature can't attack unless defending player controls an Island.
When you control no Islands, sacrifice this creature.

: Destroy target land.
At the beginning of your upkeep, unless you pay , tap this creature and sacrifice a land of an opponent's choice.

Flying (This creature can't be blocked except by creatures with flying or reach.)

This creature enters with seven +1/+0 counters on it.
At end of combat, if this creature attacked or blocked this combat, remove a +1/+0 counter from it.
, : Put up to X +1/+0 counters on this creature. This ability can't cause the total number of +1/+0 counters on this creature to be greater than seven. Activate only during your upkeep.

Flying, trample
At the beginning of your upkeep, sacrifice a creature other than this creature. If you can't, this creature deals 7 damage to you.