Animate Land

The cheapest way green has ever found to convert excess mana into a surprise. The whole design lives in the instant-speed window: a land already on the battlefield costs nothing to deploy, so the single green mana buys you a 3/3 your opponent cannot have accounted for when they attacked or stepped into combat math. It is removal bait that dodges sorcery-speed answers, a blocker that materializes after attackers are declared, and a way to push extra damage from a board that looked tapped out. The "that's still a land" clause is the quiet load-bearing piece: the animated permanent keeps producing mana and keeps every land-typed synergy intact, so you are not trading a mana source for a body, you are borrowing one for a turn. The cost of that flexibility is fragility. A 3/3 land dies to combat or removal like any creature, and losing it means losing the mana underneath, which is why the card has always been a measured tool rather than a finisher. Green has returned to this template many times at higher rates and with sturdier bodies, but the bare-bones version captures the appeal in its simplest form: one mana, end-of-turn duration, no setup, and a number large enough to matter in a fight.