It provides 500% increase in automation yield.
It costs 50M which is half the total you need to end.
You can end faster by getting a blood frenzy at 50M once than you get by paying for Heart and getting a Blood Frenzy twice.
Ah, I get you now. I thought you had missed the 500% effect, but you mean it doesn’t earn back its cost before the end. That’s fair, it is a balance issue. I appreciate the feedback.