Quietism

Spells and abilities can't be copied.
Whenever an ability on a card is triggered or activated, if it is not the first time this turn it was triggered or activated, flip a coin. If you win, exile that card. If you lose, its controller manifests that card. (Turn it face down and move it to the battlefield. It's a colorless 2/2 creature. Turn it face up at any time for its mana cost if its a creature.)