Scarwood Bandits

A green creature stealing artifacts is a deliberate color-pie joke, and the activation cost is built to keep the joke honest. The theft is a Rishadan-style "tax or take": you pay and tap the body, and the opponent either coughs up two mana to keep their artifact or watches it walk away for as long as the Bandits stick around. That last clause is the whole balancing act. This is not a permanent steal like Control Magic; it is a lease, contingent on a fragile 2/2 surviving on the board, which means any removal the opponent draws hands the artifact straight back. The forestwalk is the flavor seam holding it together: bandits in the woods, unblockable wherever forests grow, slipping in to pick a pocket. The design reads as the era's answer to the question of how green gets to touch artifacts at all, and the answer was "only conditionally, only while exposed, and only if you can keep the thief alive." It is a window-based effect that rewards a board where the opponent can't easily kill a four-mana 2/2, and punishes you the moment they can. The two-mana ransom also means the steal is rarely free; against an opponent holding up mana it becomes a slow drain on their resources rather than a guaranteed swing, which is exactly the kind of negotiated, never-quite-decisive design the early sets used to wall green off from outright artifact dominance.