- If my opponent has Arcanine ex or Gyarados ex on the Bench, will its "Tera" attribute prevent me from placing damage counters on it with Drifblim's "Curse Spreading" attack?
- No, placing damage counters is different than dealing damage, so it won't be prevented.
Source:
Scarlet & Violet FAQ; TPCi Rules Team (2023-03-30)