Renegade Krasis

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.

If evolve triggers, the stat comparison will happen again when the ability tries to resolve. If neither stat of the new creature is greater, the ability will do nothing. If the creature that entered the battlefield leaves the battlefield before evolve tries to resolve, use its last known power and toughness to compare the stats.

When comparing the stats as the evolve ability resolves, it’s possible that the stat that’s greater changes from power to toughness or vice versa. If this happens, the ability will still resolve and you’ll put a +1/+1 counter on the creature with evolve. For example, if you control a 2/2 creature with evolve and a 1/3 creature enters the battlefield under your control, it toughness is greater so evolve will trigger. In response, the 1/3 creature gets +2/-2. When the evolve trigger tries to resolve, its power is greater. You’ll put a +1/+1 counter on the creature with evolve.