Pathbreaker Ibex

Overrun put the whole team over the top once, as a sorcery, and then it was spent. This Goat welds that effect onto an attack trigger, which rewrites the math in two ways the spell never could: the pump scales off your largest creature rather than printing a fixed +3/+3, and it recurs every combat the Ibex survives to swing. The X is not a counter or a fixed line; it reads your board for the greatest single power and stamps that number, plus trample, across everyone. A board with one fat threat already wants to attack; the Ibex converts that threat into the multiplier for the rest, so a wide-and-tall field becomes lethal in a single declare-attackers step. What pays for the effect is the body and the timing: a 3/3 for six that contributes nothing before combat, and the trigger fires on the attack declaration, so the whole board is committed to the swing before the bonus lands. It dies to nearly any removal, and killing the Ibex in response to the attack trigger does not fizzle the pump (the trigger is already on the stack and resolves after the removal), so the swing still lands, but a preemptive answer removes the Ibex before it can attack at all and leaves the pump unearned. That makes it a finisher you deploy onto a built board, not a card that builds one. Among green's alpha-strike effects, its bonus climbs without a ceiling and fires more than once.