well i Did kill the Endo facefucking vanny (AT LEVEL 11 BY THE WAY !!!) and vanny became the show system still three are 7 more endos if you keep advancing and like the first one even after getting the upgrades from vanny they BEAT YOU WITH THE HEAT SYSTEM
THE KEEP SPAMMING GRAPPLE when they get 50%HP
And WITH each GRAPPLE doping 20 HEAT and the time you fail to frete yourself costing 30 HEAT they are impossible to get past