Sleep [Core Set 2019] Friday Night Magic 2000 Set: Arabian Nights Type: Creature

Set: Arabian Nights Type: Creature — Djinn Rarity: Rare Cost: {1}{U}{U} You may choose not to untap Old Man of the Sea during your untap step

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

Set: Zendikar Type: Basic Land — Island Rarity: Common ({T}: Add {U}

Set: Commander Anthology Type: Creature — Beast Rarity: Rare Cost: {5}{G}{G} Hexproof

This one seemed especially promising

Sleep [Core Set 2019] Friday Night Magic 2000 Set: Arabian Nights Type: CreatureSet: Core Set 2019 Type: Sorcery Rarity: 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