Swamp

Flight

Enchant creature
Enchanted creature has flying.

Vesuvan Doppelganger

You may have Vesuvan Doppelganger 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."

Mox Sapphire

Twiddle

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

Royal Assassin

Time Vault

Time Vault enters tapped.
Time Vault doesn't untap during your untap step.
If you would begin your turn while Time Vault is tapped, you may skip that turn instead. If you do, untap Time Vault.
{T}: Take an extra turn after this one.

Black Lotus

{T}, Sacrifice Black Lotus: Add three mana of any one color.

Mind Twist

Target player discards X cards at random.

Demonic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Merfolk of the Pearl Trident

Island

Air Elemental

Time Walk

Terror

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Unsummon

Return target creature to its owner's hand.

Lord of Atlantis

Other Merfolk get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)