Legerdemain

Exchange control of target artifact or creature and another target permanent that shares one of those types with it. (This effect lasts indefinitely.)

Mana Severance

Search your library for any number of land cards, exile them, then shuffle.

Manta Riders

{U}: This creature gains flying until end of turn.

Mawcor

Flying
{T}: This creature deals 1 damage to any target.

Meditate

Draw four cards. You skip your next turn.

Mnemonic Sliver

All Slivers have "{2}, Sacrifice this permanent: Draw a card."

Power Sink

Counter target spell unless its controller pays {X}. If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.

Precognition

At the beginning of your upkeep, you may look at the top card of target opponent's library. If you do, you may put that card on the bottom of that player's library.

Circle of Protection: Black

{1}: The next time a black source of your choice would deal damage to you this turn, prevent that damage.

Propaganda

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

Rootwater Diver

{T}, Sacrifice this creature: Return target artifact card from your graveyard to your hand.

Rootwater Hunter

{T}: This creature deals 1 damage to any target.

Rootwater Matriarch

{T}: Gain control of target creature for as long as that creature is enchanted.

Rootwater Shaman

You may cast Aura spells with enchant creature as though they had flash.

Sea Monster

This creature can't attack unless defending player controls an Island.

Shadow Rift

Target creature gains shadow until end of turn. (It can block or be blocked by only creatures with shadow.)
Draw a card.

Tempest