Sheoldred, Whispering One [New Phyrexia] Amonkhet Invocations if it isn't a mana

if it isn't a mana ability

"Her voice is damnation

Spend this mana only to cast artifact spells

Reverse Type: Legendary Planeswalker — Gideon +2: Up to one target creature an opponent controls attacks Gideon

When Glacial Chasm enters the battlefield

Sheoldred, Whispering One [New Phyrexia] Amonkhet Invocations if it isn't a manaSet: New Phyrexia Type: Legendary Creature Phyrexian Praetor Rarity: Mythic Cost: {5}{B}{B} Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) At the beginning of your upkeep, return target creature card from your graveyard to the battlefield. At the beginning of each opponent's upkeep, that player sacrifices a creature.