text: You can put the triggered ability on the stack without a target. As it resolves, you’ll just put a +1/+1 counter on Immersturm Predator. However, if you do choose a target, and that card is an illegal target as the ability tries to resolve, the ability won’t resolve and none of its effects will happen. In that case, you won’t put a +1/+1 counter on Immersturm Predator.