Miner's Bane

Six power on three toughness is a body built to attack and nothing else: it folds to almost any block or burn spell, but it demands an answer the turn it lands or it takes a third of an opponent's life. The pump ability is what converts that fragility into a clock. Each activation costs for a single +1/+0, so it is no Firebreathing engine where loose mana pours straight into face damage; the rate is deliberately slow. What it buys is trample, and that is the real upgrade. Once the creature can trample, a chump block stops absorbing the hit and starts leaking it through, so a defender who can only throw a small body in the way no longer stalls the race. Against an open board the activation just makes a fast clock faster; against a single blocker it turns the attack into a finisher, because the +1 stacks the trample math in the attacker's favor a little more each turn. The whole design is a late-game mana sink for a red aggro deck that has run out of curve and needs somewhere to dump a top-decked land. The thin toughness is the price of the package: the card is content to die in the exchange, so long as it forces removal or feeds the opponent a steadily growing trample hit first. Plain, honest aggression with a knob to turn when the gas runs low.