Umezawa's Jitte is a rare Legendary Artifact — Equipment card from The List (PLST), collector number BOK-163. Current market price: $11.92, TCGplayer market prices via Scryfall.
Whenever equipped creature deals combat damage, put two charge counters on Umezawa's Jitte. Remove a charge counter from Umezawa's Jitte: Choose one — • Equipped creature gets +2/+2 until end of turn. • Target creature gets -1/-1 until end of turn. • You gain 2 life. Equip {2}