Roaring Slagwurm

Green has always policed artifacts by destroying them; this wurm does it by exhausting them instead. When it attacks, every artifact on the battlefield taps, so a board leaning on mana rocks, equipment, and artifact creatures gets emptied of blockers and accelerants in a single swing. Against the artifact-saturated decks of its era that reads as a one-sided alpha strike: the resources the opponent built their game on go sideways the moment the assault lands. The catch is the body underneath the idea. A 6/4 wants to swing repeatedly into removal and chump blocks, and four toughness is too soft a back end for a creature meant to keep connecting. Worse, the trigger fires on attack rather than on cast, which means it does nothing the turn the wurm arrives. Summoning sickness keeps it home for a full rotation, handing the opponent a clean window to kill it before any tap-down ever happens; the disruption only lands once the creature has survived a turn it spent doing nothing. So the concept reaches past what the statline can carry: a legible, brute-force piece of anti-artifact tech that asks you to live long enough to untap with it, in an era when surviving the artifact decks was the entire problem.