Blade of the Bloodchief is a rare Artifact — Equipment card from Commander 2017 (C17), collector number 204. Current market price: $7.13, TCGplayer market prices via Scryfall.
Whenever a creature dies, put a +1/+1 counter on equipped creature. If equipped creature is a Vampire, put two +1/+1 counters on it instead. Equip {1}