Edit: Sounds like the limit is 2 energy per opponent per combat, except in the case of first and double strike, which triggers Pia both damage steps. Thanks Lemmy!

Original question:

I’m a bit confused on her first ability. If 3 artifact creatures did combat damage to a player, would that make 6 energy, or just 2?

It’s the “one or more” text that makes me wonder if there is a cap of 2 energy per combat. Hoping not since I want to make an energy commander deck with her.