+Sleep (15)
Enchant creature
When Charmed Sleep enters the battlefield, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
Flying
When Emissary of the Sleepless enters the battlefield, if a creature died this turn, create a 1/1 white Spirit creature token with flying.
Other creatures you control get +1/+1.
Enchanted creature can't attack or block.
Enchanted creature has "At the beginning of your upkeep, you lose 1 life."
Tap up to two target creatures.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, those creatures don't untap during their controllers' next untap steps.
Whenever enchanted creature deals damage to a player, return target creature that player controls to its owner's hand.
Tap all creatures target player controls. Those creatures don't untap during that player's next untap step.
Tap target creature. It doesn't untap during its controller's next untap step.
Escape—, Exile three other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)
When Sleep Paralysis enters the battlefield, tap enchanted creature.
When Sleeper Agent enters the battlefield, target opponent gains control of it.
At the beginning of your upkeep, Sleeper Agent deals 2 damage to you.
When Sleeper Dart enters the battlefield, draw a card.
, Sacrifice Sleeper Dart: Target creature doesn't untap during its controller's next untap step.
Enchanted creature has fear. (It can't be blocked except by artifact creatures and/or black creatures.)
When Sleeper's Guile is put into a graveyard from the battlefield, return Sleeper's Guile to its owner's hand.
Whenever enchanted creature deals combat damage to an opponent, you may draw a card.
When Sleeping Potion enters the battlefield, tap enchanted creature.
When enchanted creature becomes the target of a spell or ability, sacrifice Sleeping Potion.
Xantcha, Sleeper Agent enters the battlefield under the control of an opponent of your choice.
Xantcha attacks each combat if able and can't attack its owner or planeswalkers its owner controls.
: Xantcha's controller loses 2 life and you draw a card. Any player may activate this ability.