Mahamoti Djinn

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

Jayemdae Tome

Air Elemental

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.

Mountain

Disintegrate

Disintegrate deals X damage to any target. If it's a creature, it can't be regenerated this turn, and if it would die this turn, exile it instead.

Island

Counterspell

Sol Ring

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Braingeyser

Earthquake

Earthquake deals X damage to each creature without flying and each player.

Shatter

Control Magic

Enchant creature
You control enchanted creature.

Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.