Phantasmal Terrain

Enchant land
As Phantasmal Terrain enters, choose a basic land type.
Enchanted land is the chosen type.

Timetwister

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

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

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

Enchant land
Whenever enchanted land becomes tapped, Psychic Venom deals 2 damage to that land's controller.

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

Enchant creature
You control enchanted creature.

Psionic Blast deals 4 damage to any target and 2 damage to you.