Whip of Erebos [Theros] Arkhos where X is that spell's

where X is that spell's mana value

Set: Fourth Edition Type: Artifact Rarity: Rare Cost: {1} Mana Vault doesn't untap during your untap step

When Ethersworn Shieldmage enters the battlefield

Set: Betrayers of Kamigawa Type: Instant — Arcane Rarity: Rare Cost: {X}{U}{U} You may exile a blue card with mana value X from your hand rather than pay this spell's mana cost

"Monsters dwell in every heart

Whip of Erebos [Theros] Arkhos where X is that spell'sSet: Theros Type: Legendary Enchantment Artifact Rarity: Rare Cost: {2}{B}{B} Creatures you control have lifelink. {2}{B}{B}, {T}: Return target creature card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step. If it would leave the battlefield, exile it instead of putting it anywhere else. Activate only as a sorcery.