Goldfury Strider

The pump ability reads like a sinkless mana-dump but is actually a convert-the-clutter engine: tap any two untapped artifacts and/or creatures you already control and a target creature gets +2/+0. The cost isn't mana, it's board presence you were going to spend anyway. Sacrificial fodder, idle tokens, artifact creatures standing around: all of it feeds a repeatable buff. What constrains it is that the fuel has to be untapped when you fire, so a mana rock that already tapped for the turn is off the table, and a creature you plan to swing with can't feed the pump and then attack. The engine wants permanents that were never going to do anything on the crack-back anyway. It also fires only on your own main phase, which shapes everything about how it plays: no held-up bluff, no lethal boost after blockers commit, no reaching across to pump a blocker on the opponent's turn. The aggression it enables has to be declared before you swing, fully telegraphed. The 3/5 trample body is deliberately unglamorous: durable enough to hold ground, big enough that its own pump shoves damage past a chump, but never a card that ends games on its own. It's built to be the engine in a wide board rather than the payoff, spending accumulated width to push a single attacker out of blocking range on the turn you commit.