Goldwarden's Helm

For Mirrodin! is the keyword that solved a specific problem with Equipment: the two-card tax. An Equipment does nothing until it has a body to hold it, so playing one on an empty board is a wasted turn and a dead card until the creature arrives. This one sidesteps that entirely by manufacturing its own carrier, a 2/2 Rebel that shows up already suited up, so the whole package is a three-mana play that lands a 2/3 threat with no prior setup. The buff itself is deliberately slight: the token is where the value lives, and the single point of toughness is a garnish, not a reason to run the card. Where it earns its slot is later, once the original Rebel has died and the Helm is lying in the dirt. It becomes a repeatable equip effect, a permanent that keeps rebuilding a threat's durability across whatever creatures survive, which is the quiet upside of the whole For Mirrodin! design: these cards front-load as a creature spell and back-end as an Equipment, and the second half is free once you have already paid for the first. It reads like a weak aura and plays like a resilient body that leaves a tool behind, which is exactly the trade the keyword was built to make.