Necropotence [Iconic Masters] Locus you may pay {0} rather

you may pay {0} rather than pay the mana cost for a spell you cast with mana value X or less

Set: Dragons of Tarkir Prerelease Promos Type: Legendary Creature — Zombie Naga Rarity: Rare Cost: {3}{B}{B} Deathtouch

Her might shall punish the lawless

Set: Revised Edition Type: Creature — Shapeshifter Rarity: Rare Cost: {3}{U}{U} You may have Vesuvan Doppelganger enter the battlefield as a copy of any creature on the battlefield

Necropotence [Iconic Masters] Locus you may pay {0} ratherSet: Iconic Masters Type: Enchantment Rarity: Mythic Cost: {B}{B}{B} Skip your draw step. Whenever you discard a card, exile that card from your graveyard. Pay 1 life: Exile the top card of your library face down. Put that card into your hand at the beginning of your next end step.