Sleep [Commander 2015] SPA Maton del hacha and if it's a creature

and if it's a creature

"The gods of Theros are born of the expectations and beliefs of mortals

Set: Legends Type: Legendary Creature — Elf Warrior Uncommon Cost: {3}{R}{R}{G} Rampage 1 (Whenever this creature becomes blocked

Set: Mercadian Masques Type: Enchantment Rare Cost: {3}{U} Nonland permanents don't untap during their controllers' untap steps

and that may answer

Sleep [Commander 2015] SPA Maton del hacha and if it's a creatureSet: Commander 2015 Type: Sorcery Uncommon Cost: {2}{U}{U} Tap all creatures target player controls. Those creatures don't untap during that player's next untap step. "I give them dreams so wondrous that they hesitate to return to the world of the conscious." Garild, merfolk mage