Giant Tortoise

This creature gets +0/+3 as long as it's untapped.

Control Magic

Enchant creature
You control enchanted creature.

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.

Flying Men

Counterspell

Mons's Goblin Raiders

Island

Braingeyser

Air Elemental

Goblin Balloon Brigade

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

Earthbind

Enchant creature
When this Aura enters, if enchanted creature has flying, this Aura deals 2 damage to that creature and this Aura gains "Enchanted creature loses flying."

Uthden Troll

Unsummon

Return target creature to its owner's hand.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Ali from Cairo

Damage that would reduce your life total to less than 1 reduces it to 1 instead.

Mountain

Fire Elemental

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.

Water Elemental

Invisibility

Enchant creature
Enchanted creature can't be blocked except by Walls.

Rukh Egg

When this creature dies, create a 4/4 red Bird creature token with flying at the beginning of the next end step.