Detainment Spell

• WWizards of the Coast2006-09-25
  Official Ruling
  Responding to a creature's activated ability being activated by moving Detainment Spell onto that creature won't affect the ability that was just activated.
• WWizards of the Coast2006-09-25
  Official Ruling
  Detainment Spell prevents mana abilities of the enchanted creature from being activated.
• WWizards of the Coast2006-09-25
  Official Ruling
  Morph isn't an activated ability, so Detainment Spell doesn't prevent face-down creatures from being able to turn face up.

Rulings via Scryfall