Thirsting Axe

Artifact — Equipment - (uncommon)

Equipped creature gets +4/+0.
At the beginning of your end step, if equipped creature didn't deal combat damage to a creature this turn, sacrifice it.
Equip 

Sometimes the weapon wields the bearer.

Price

manapool 0.15

tcgplayer 0.02

cardmarket 0.09

cardkingdom 0.35

cardsphere 0.19