MTG Salvation

Specifically, tokens of her, so that they immediately lose the game.

Looking around for ways and I'm not coming up with them at the moment, figured I would enlist some assistance.

Thanks in advance!

I found one way thus far just now, which would be giving your opponent Faerie Artisans and then while they control it cast Phage from your hand.

Fractured Identity if you are playing Esper. Otherwise, Endless Whispers is probably the go to in mono-black. Fractured Identity requires some Flash enabler and Whispers is tough to just kill the whole table with if you are trying to respond to her trigger.