Helm of Possession [Tempest] Frog Horror if you have no cards

if you have no cards in hand

Set: Ice Age Type: Instant Rarity: Uncommon Cost: {1}{B}{R} As an additional cost to cast this spell

"I'd call that a successful first test

Set: Shadowmoor Type: Legendary Creature — Merfolk Rogue Rarity: Rare Cost: {U/B}{U/B} At the beginning of each end step

Set: Commander 2011 Type: Enchantment Rarity: Rare Cost: {3}{R} Your opponents can't search libraries

Helm of Possession [Tempest] Frog Horror if you have no cardsSet: Tempest Type: Artifact Rarity: Rare Cost: {4} You may choose not to untap Helm of Possession during your untap step. {2}, {T}, Sacrifice a creature: Gain control of target creature for as long as you control Helm of Possession and Helm of Possession remains tapped.