Ronja, if it makes you feel better, you're not the only who just shot themselves in the foot. I thought I could use my second WW part to fight the Water Spirit. I only need a few poisoned wood to make my last two water compasses and then I could spawn the Water Spirit right after activating my second 10 minutes of limited energy. However, I'm also short 2 poisoned maps for those last two water compasses and now I can't fight a toxic spirit without immediately triggering the unlimited energy. But that doesn't give me time to craft the compasses! Grrrr.
Oh well, I'll invest the unlimited energy in collecting more poisoned wood, that's also a huge energy savings...