But could you use Anti-Matter on your opponent's 30/23 Vampiric Lava Golem with Momentum?
No? I see.
Yeah, but simply using it in a Fractal deck does limit it considerably. The design is made to allow any deck to us spell cards, if they're all from the same element then a Tower will usually be better.
If you could manage to get 6 SoAs out though, you could Fractal every other turn with just your mark. Although, you could do the same with 6 Aether Towers, and Fractal every turn with 7+Mark.