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.
If combat damage is dealt at the same time by one or several artifact creatures, then the ability triggers once (you get 2 energy).
If artifact creatures with first/double strike are attacking, you will get a trigger for the first time combat damage is dealt by the first/double strikers, and a second trigger happens for the other artifact creatures and the second times double strikers deal damage (you get a total of 4 energy).
From the Comprehensive Rules:
Source: https://antifandom.com/mtg/wiki/Combat_damage_step
Thanks!! Definitely will change how I build the deck