A legendary drink originate in BO1. When you drink it you instantly get invincibility to explosives, and fall damage. Plus you can dolphin dive and do splash damage. Sadly Trollarch doesn't like giving us PHD flopper. And, it is limited to few maps and in others is a permaperk.
Player 1-Hey bro let's get PHD flopper
Player 2-Are you retarded? That's not even in this map Treyarc doesn't add it to maps ever.