Sylvan Safekeeper [Commander 2014] Valla Pockets of Æther can be

Pockets of Æther can be so foul they melt flesh from bone

Set: Modern Masters 2015 Type: Creature — Lhurgoyf Rarity: Mythic Cost: {1}{G} Tarmogoyf's power is equal to the number of card types among cards in all graveyards and its toughness is equal to that number plus 1

Damage wears off

Release it

Set: Arabian Nights Type: Artifact Rarity: Rare Cost: {3} {2}

Sylvan Safekeeper [Commander 2014] Valla Pockets of Æther can beSet: Commander 2014 Type: Creature Human Wizard Rarity: Rare Cost: {G} Sacrifice a land: Target creature you control gains shroud until end of turn. (It can't be the target of spells or abilities.) "He has been to the heart of the wood. Did you truly expect to wield power over him?" Oakhide druid