Juggernaut

This creature attacks each combat if able.
This creature can't be blocked by Walls.

Atog

Sacrifice an artifact: Atog gets +2/+2 until end of turn.

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

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.

Wheel of Fortune

Each player discards their hand, then draws seven cards.

Serendib Efreet

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

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Island

Unsummon

Return target creature to its owner's hand.

Braingeyser

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.

Sol Ring

Black Vise

As Black Vise enters, choose an opponent.
At the beginning of the chosen player's upkeep, Black Vise deals X damage to that player, where X is the number of cards in their hand minus 4.