Forum:Souza vs Catastor

So i looked online for rulings on this and all i could find were forums. So heres the situation: opponent controls an ally of justice catastor and i control a x-saber souza with the first effect active. everything i found says that they both would die but this is what i think. Since both souza and catastor's effects are spell speed 1, they cannot be chained to another card effect. and since souza's effect only works during my turn, my effect goes first. since catastor cannot chain, it has to wait for my effect to resolve. when my effect resolves, catastor is in the grave and souza doesnt die. This all sounds legal and good for me, but its not up anywhere.