Enchant land
Enchanted land has "At the beginning of your upkeep, you may pay . If you do, you gain 1 life."

Destroy X target Mountains. Volcanic Eruption deals damage to each creature and each player equal to the number of Mountains put into a graveyard this way.

: The next time an unblocked creature of your choice would deal combat damage to you this turn, prevent all but 1 of that damage.

This creature gets +1/+1 as long as you control a Swamp.
: Regenerate this creature.

Other Goblins get +1/+1 and have mountainwalk.

Other Zombie creatures have swampwalk. (They can't be blocked as long as defending player controls a Swamp.)
Other Zombies have ": Regenerate this permanent."

Each player shuffles their hand and graveyard into their library, then draws seven cards. (Then put Timetwister into its owner's graveyard.)

Enchant land
When enchanted land becomes tapped, destroy it. That land's controller may attach this Aura to a land of their choice.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

Tap all lands target player controls and that player loses all unspent mana.

You may spend white mana as though it were red mana.

, : Draw a card.

Destroy all creatures. They can't be regenerated.

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

Whenever a player taps a land for mana, this enchantment deals 1 damage to that player.

Destroy all lands.

, : Put a mire counter on target non-Swamp land. That land is a Swamp for as long as it has a mire counter on it. Activate only during your upkeep.
When this artifact is put into a graveyard from the battlefield, at the beginning of each of your upkeeps for the rest of the game, remove all mire counters from a land that a mire counter was put onto with this artifact but that a mire counter has not been removed from with this artifact.

, : Destroy target black permanent.

: The next time a source of your choice would deal damage to target creature this turn, that source deals that damage to you instead.

All Forests are 1/1 creatures that are still lands.

As this enchantment enters, you lose life equal to your life total.
You don't lose the game for having 0 or less life.
If you would gain life, draw that many cards instead.
Whenever you're dealt damage, sacrifice that many nontoken permanents. If you can't, you lose the game.
When this enchantment is put into a graveyard from the battlefield, you lose the game.

Flying

Red creatures get +1/+1.
Whenever a Mountain is tapped for mana, its controller adds an additional .

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

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.

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."

, : 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.)

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

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.