Tanuki Transplanter is a rare Artifact Creature — Equipment Dog card from Neon Dynasty Commander (NEC), collector number 72. Current market price: $1.43, TCGplayer market prices via Scryfall.
Whenever this creature or equipped creature attacks, add an amount of {G} equal to its power. Until end of turn, you don't lose this mana as steps and phases end. Reconfigure {3} ({3}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)