Savage Beating Savage Beating is a pretty powerful card that forms two-card combos with many cards, like Spellbinder and Chun-Li, Countless Kicks, which explains why its sought after and worth $15
Fullmetalfoes Fusion is a Quick-Play Spell so it cannot be used on the turn that it is set, but Metalfoes Mithrilium effect could bounce it back to hand, allowing it to be activated during the Battle Phase for an OTK
You could stretch to include even Deekah, Fractal Theorist, but that seems totally impossible, not just mostly impossible, to me
Essence of Orthodoxy is basically a back-up of Brimaz
This list is for kitchen table formats like Commander, multiplayer, Highlander, Type Four, Five Color, Cube, and more
Legality depends on the tournament format -- The Monarchs Erupt can be legal in some formats and banned or restricted in others