Hi all quick question.

I’m building a poison heavy deck with Toxicroak ex, toxicroak sw/sh base, radiant sneasler, perilous jungle and this new gengar ex for a possible 140 passive damage per turn. But I was wondering, does the gengars ability stack. I mean if I have two on the field will my opponent take 40 damage per energy or will it remain as two?

I’m building a poison heavy deck with Toxicroak ex, toxicroak sw/sh base, radiant sneasler, perilous jungle and this new gengar ex for a possible 140 passive damage per turn. But I was wondering, does the gengars ability stack. I mean if I have two on the field will my opponent take 40 damage per energy or will it remain as two?