Renegade Krasis “evolves” when its evolve ability resolves and a +1/+1 counter is put on it. If a replacement effect such as Doubling Season’s causes the evolve ability to put more than one +1/+1 counter on Renegade Krasis, its last ability triggers only once. If no +1/+1 counter is put on it (perhaps because it left the battlefield in response to its evolve ability triggering), then its last ability doesn’t trigger.