Marciano and Magtok
The MechanoPanther opens its mouth and...
Seemingly sprays a rotten egg smelling liquid at Marciano, likely soaking him as robots very rarely miss.
Then a spout of flame comes out of the panther's mouth, most likely igniting the extremely flammable liquid that had most likely soaked Marciano.
And probably burning him alive very, very slowly and very painfully.
If the panther missed Marciano with the liquid in the first place, it'll just electrocute him using its tail.
((One does not simply run into AMEN and try to kill Magtok without dying themselves, and there's no other way this could have ended.))