When Graveyard Shift Valentine defeats an opponent and receives 2x Regen from her SA, she can then use Chocoglycemia to double this regeneration. She can do this multiple times by using multiple Chocoglycemia, waiting for 2 stacks to fade and then reapplying the doubled regeneration afterwards. I recorded a video to demonstrate the bug in question. Here Side Note: I also assume that enemy Valentines can also do the same, but the AI can't exploit it like players can. "Cheat Day!"