I just lost a game because it didn't target my creatures when I was fighting a mono-aether deck. If you play it and all your opponent's creatures are immortal, it will take the quanta but not effect your creatures.
Every mass CC removes Cloak.
The text of the card has changed because of "Cloak":"A random effect is inflicted to every (enemy) creature on the field. Removes invisibility.!
Mutation too or hatch too; not on the wiki though