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.

Island

Braingeyser

Mahamoti Djinn

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

Control Magic

Enchant creature
You control enchanted creature.

Air Elemental

Clone

You may have Clone enter as a copy of any creature on the battlefield.

Prodigal Sorcerer

{T}: Prodigal Sorcerer deals 1 damage to any target.

Sol Ring

Serendib Efreet

Flying
At the beginning of your upkeep, Serendib Efreet deals 1 damage to you.