Endemic Plague

Tribal wraths cut both ways, and this one hands you the scalpel: you decide which creatures die by choosing what you feed it. Sacrifice a Goblin and every Goblin on the battlefield goes with it, the opposing swarm reduced to nothing while your off-type creatures stay standing. The targeted asymmetry is the whole pitch, a board wipe that ignores anything outside the named tribe. The catch is structural. You must control a creature of the type you want to erase, and you must be willing to feed it to the spell, which ties the answer directly to your read on the opposing tribe. That control requirement, not ownership, opens the sharpest line: steal an opposing creature, then sacrifice it to delete the type it belongs to, turning their own swarm into the trigger for its destruction. Against a deck that shares your tribe the spell can be a wash; against one with no overlapping type at all, it does little. The regeneration-proof clause shuts the obvious escape hatch, which mattered in an era when regenerators were a real combat consideration. As typal design has grown more granular over time, with creatures stacking three and four types apiece, the spell's reach has quietly widened: one sacrifice can now catch far more than the early designs ever anticipated, making it a deeper cut the thicker the typal soup gets.