Scourge of Fleets

Creature - Kraken

When Scourge of Fleets enters the battlefield, return each creature your opponents control with toughness X or less to its owner's hand, where X is the number of Islands you control.

Spawn of Thraxes

Creature - Dragon

Flying

When Spawn of Thraxes enters the battlefield, it deals damage to target creature or player equal to the number of Mountains you control.

Sparks from Purphoros's forge fill the belly of every dragon.

Revel of the Fallen God

Sorcery

Put four 2/2 red and green Satyr creature tokens with haste onto the battlefield.

"Xenagos has fallen, and the world grows dark without him. What can ever fill that darkness but our rage?"
-Guruthes, disciple of Xenagos

Worst Fears

Sorcery

You control target player during that player's next turn. Exile Worst Fears. (You see all cards that player could see and make all decisions for the player.)

Elspeth feared that her trespass into Nyx would not go unanswered.

Bearer of the Heavens

Creature - Giant

When Bearer of the Heavens dies, destroy all permanents at the beginning of the next end step.

To hold the heavens from the earth is no curse, but a titanic responsibility.