Sunfire Torch
The trick this Equipment plays is folding a removal spell into an aggressive tempo tool without asking you to pay for both at once. For a single red mana up front and one more to attach, the equipped creature gets a modest +1/+0 and, on the turn it attacks, an option: keep swinging, or cash in the torch for two damage anywhere. That sacrifice clause turns a plain buff into a resource you spend once, so the decision stays live all game: is the two damage worth more now, aimed at a blocker or a face or a planeswalker, than the recurring power boost you keep by leaving it attached? The attack trigger frames the whole thing. You commit the creature to combat first, then decide whether the torch fires, which means the sacrifice reads combat math and threat priority rather than firing on a whim. Note the constraint that pays for the flexibility: because the burst is bolted to an attack trigger, this is a proactive tool only, spent during your declare-attackers step, never a burn spell you can hold up on an opponent's turn. It is a compact design: reusable pressure that converts, on demand, into a targeted burst. The one-mana cost means it rarely clogs a hand, and "any target" keeps the payoff relevant against creatures, players, planeswalkers, and battles alike.
