Tawnos's Tinkering

The animation and the counters are welded into a single resolution for a reason: strip the buff away and a land or artifact turned into a 0/0 dies to state-based actions the instant it changes type. Bolting two +1/+1 counters onto that transformation means the target survives, and green gets an instant-speed way to press a mana rock, a Vehicle, or a plain land into service as a body. The type change carries no "until end of turn" clause, so it is permanent: the land you animate is a creature from here on, which opens it to creature removal it used to dodge. The untap does quieter work than it looks, standing a tapped-down permanent back up to block or refreshing something whose own ability left it exhausted. It will not sneak a freshly animated land into a swing that keeps mana open, though, since the untap happens on resolution and the land still taps to attack unless it has vigilance. This sits in the long green tradition of blurring the line between mana source and threat, spells that quietly recruit your board's noncreature half into combat. Cast on a creature that already exists, it collapses to a plain two-counter untap that banks permanent stats, no transformation required.