Mana Vortex [The Dark] Nightmare Hydra each creature that player controls

each creature that player controls attacks if able

Ingenious Prodigy enters the battlefield with X +1/+1 counters on it

Set: March of the Machine Commander Type: Creature — Giant Knight Rarity: Uncommon Cost: {5}{W}{B} {3}

When Cartographer's Hawk deals combat damage to a player who controls more lands than you

Set: Zendikar Rising Prerelease Promos Type: Artifact — Equipment Rarity: Rare Cost: {2}{W} When Maul of the Skyclaves enters the battlefield

Mana Vortex [The Dark] Nightmare Hydra each creature that player controlsSet: The Dark Type: Enchantment Rarity: Rare Cost: {1}{U}{U} When you cast this spell, counter it unless you sacrifice a land. At the beginning of each player's upkeep, that player sacrifices a land. When there are no lands on the battlefield, sacrifice Mana Vortex.