Bazaar Trader

A donation engine wearing a Goblin's body. The whole point is the phrase "target player": this hands permanents to anyone, which turns a 1/1 into a combo piece and a political instrument at once. The standard abuse is to give away something the recipient cannot safely keep, or something that punishes whoever holds it: a creature with a death-trigger drawback, an artifact carrying an upkeep cost the new controller did not budget for, a land that triggers when its controller does something they would rather not. Note the target restriction, though: it can only move an artifact, creature, or land, never an enchantment or planeswalker, so the gift has to come from those three card types. The control change is the load-bearing part: it rewrites who "you" means for the donated permanent, so any ability keyed to its controller now answers to the recipient rather than to you (ownership stays put, which is why it cannot dodge effects keyed to the owner). The cost is exactly what you would want from an effect this flexible: a tap and a full turn cycle per gift, only permanents you already control as fuel, and a frame the cheapest interaction in the game can answer. That tap-to-donate rate, one permanent per turn, is what separates it from a one-shot giveaway like Donate or Harmless Offering: a repeatable faucet rather than a single pour, a value engine for some lines and a slow-motion liability for others.