Sleep Paralysis
Enchantment — Aura
Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
Josu Hernaiz
Welcome Deck 2017 (W17)
• #11Rulings
If the target creature is an illegal target by the time Sleep Paralysis tries to resolve, the spell doesn't resolve. It won't enter the battlefield, so its ability won't trigger.
(wotc • 2019-07-12)
Rulings
If the target creature is an illegal target by the time Sleep Paralysis tries to resolve, the spell doesn't resolve. It won't enter the battlefield, so its ability won't trigger.
(wotc • 2019-07-12)