Ancient Imperiosaur

Convoke and a "counter for each creature" clause usually pull against each other as design goals: convoke wants a wide board of small bodies to spend on the cost, while a scaling-counter payoff wants that same width to convert into raw size on a single threat. This dinosaur resolves the tension by paying twice for the same tap. Every creature you tap to convoke shaves a mana off the cost and stacks two more +1/+1 counters onto the 6/6 frame, so the width that discounts the spell is the same width that inflates it. Nothing dies to cast it: the bodies stay on the battlefield, just tapped, which is exactly what makes the follow-up plan work. The math is deliberately lopsided: convoke with three creatures and a trampling body arrives at 12/12 for a handful of actual mana. Ward is what stops it from being a free blowout, taxing the spot removal that would otherwise punish you for tapping down your battlefield to deploy it. There's a real tempo cost buried in the design, though: the creatures you tap for convoke are exactly the attackers you can't also swing with that turn, which frames the card as a follow-up haymaker rather than a same-turn alpha strike. The lineage runs back to green's oldest idea that going wide should convert into raw size, from convoke's guildmage-era printings through the token payoffs that followed. What's new is folding the wide-board reward and the wide-board cost into one spell, so a plan you were already executing builds its own finisher.