As such Mongrel is pretty weak in cube these days and not the sort of thing you are looking for in a cube discard outlet
Exile the tokens at end of combat.) Creature Artifact - Soldier Alien Cult of Skaro Whenever Cult of Skaro attacks, choose one at random Thay Put a +1/+1 counter on each artifact creature you control
The combination of discard, counterspell, direct damage, and recursion means that youll usually have the right tools for the job, especially if the game goes long
Remember it counts itself when the trigger goes on the stack, so you can always counter anything that costs one or less
You also don't have to sacrifice things to him that make no sense, like lands or artifacts
Notice how both sides of the card have unique names, so they function as wholly separate cards