Icefall Regent [Archenemy: Nicol Bolas] Serpent there was first terror

there was first terror

Set: Commander 2016 Type: Land Uncommon Cost: Simic Growth Chamber enters the battlefield tapped

Set: Hour of Devastation Type: Creature — Demon Rare Cost: {4}{B}{B} Flying Apocalypse Demon's power and toughness are each equal to the number of cards in your graveyard

but as a hidden line of defense

Icefall Regent [Archenemy: Nicol Bolas] Serpent there was first terrorSet: Archenemy: Nicol Bolas Type: Creature Dragon Rare Cost: {3}{U}{U} Flying When Icefall Regent enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control Icefall Regent. Spells your opponents cast that target Icefall Regent cost {2} more to cast.