Blade of the Bloodchief is a rare Artifact — Equipment card from The Lost Caverns of Ixalan Commander (LCC), collector number 300. Current market price: $6.05, 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}