An ability that triggers when you cast a spell resolves before the spell that caused it to trigger. It resolves even if that spell is countered.

If you cast a spell that targets this creature multiple times, this ability triggers just once.

This ability doesn't trigger if you copy a spell that targets it, or if a spell's targets are changed to target it.

This effect affects only creatures you control at the time the ability resolves. Creatures you begin to control later in the turn won't get +1/+0.