Sheoldred, Whispering One [New Phyrexia Prerelease Promos] Aether Revolt Set: Battlebond Type: Creature —

Set: Battlebond Type: Creature — Spirit Rarity: Rare Cost: {3}{G}{G} Untap all permanents you control during each other player's untap step

This is one of its dead ends

Your creatures aren't destroyed due to damage or deathtouch and aren't put into a graveyard due to having 0 or less toughness

that player loses 10 life

"When one wolf calls

Sheoldred, Whispering One [New Phyrexia Prerelease Promos] Aether Revolt Set: Battlebond Type: Creature —Set: New Phyrexia Prerelease Promos 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.