After blackmailing you (with the Omega Device that wipes out anyone from infinity) for a few weeks to “work” with him to save the Central Finite Curve from various atrocities attacking it, you manage to destroy his lab as well as using the device to funnily enough wipe itself out from all timelines (you even blocked his number). This pissed off the extremely intelligent Evil Morty & he ripped a portal into your bunker hideout dimension to kill you for this. He’s using all his abilities & tech.