Chainflail Centipede is a common Artifact Creature — Equipment Insect card from Kamigawa: Neon Dynasty (NEO), collector number 90. Current market price: $0.11 (foil $0.13), TCGplayer market prices via Scryfall.
Whenever this creature or equipped creature attacks, it gets +2/+0 until end of turn. Reconfigure {2} ({2}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)