Ramosian Greatsword

Convoke on an Equipment is the wrinkle worth chewing on. The keyword was built for spells you fire and forget: tap a board, resolve the effect, move on. Bolting it onto a permanent that sticks around creates a strange tension, because the same creatures you tap to pay for the sword are the creatures that then can't attack the turn it lands. You are, in effect, spending your battlefield twice: once to buy the Equipment onto the stack, and again to swing after it resolves. The convoke discount rewards a wide board, but a wide board also wants to be attacking, so you end up sequencing around a hole in your own tempo rather than casting it cheaply and racing. That the equip cost still sits on top means the reduced casting cost is only half the bill; the sword drops for less and then charges rent to move between creatures. The +3/+1 and trample payload points at exactly the deck that can afford convoke: a go-wide board that wants one attacker to punch through blockers and end things. Whether the convoke saving is real or illusory depends entirely on how much you value the bodies you're tapping, which is the genuine puzzle here and the reason this is more than a generic beefy Equipment.