Damnation, Toxic Deluge, Brotherhood's End, and Blasphemous Act give you a variety of wraths to use at multiple points in the game to keep the board clear
Electric Seaweed Electric Seaweed puts a red spin on Massacre Girl by dealing damage rather than reducing toughness, which opens the door to many synergies
Still, its a colorless way to do mass permanent destruction, and if you have permanents stuck inside Oblivion Rings, youll get the upper hand
Heliod, Sun-Crowned can step in for Archangel of Thune, putting a +1/+1 counter on target creature or enchantment whenever I gain life
It can enable you to skirt boardwipes, cast sorcery speed win conditions outside of your turn, and otherwise commit shenanigans for just two mana (and losing a land)
Mega Gardevoir ex, much like a few cards on this list, has seen its value dip recently, although a recovery is already underway