Immersturm Predator

• WWizards of the Coast2024-11-08
  Official Ruling
  You don't have to choose a target for Immersturm Predator's triggered ability. 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.
• WWizards of the Coast2024-11-08
  Official Ruling
  You can activate Immersturm Predator's last ability even if it's already tapped.
• WWizards of the Coast2024-11-08
  Official Ruling
  Immersturm Predator's triggered ability doesn't allow you to tap Immersturm Predator. You have to find some other way to tap it. Let us suggest attacking.
• WWizards of the Coast2024-11-08
  Official Ruling
  For the triggered ability to trigger, Immersturm Predator has to actually change from untapped to tapped. If an effect attempts to tap it while it is already tapped, the ability won't trigger.

Rulings via Scryfall