Painblinder Mycaxe

Weapon (any axe), uncommon
  The wood and iron of this once-pristine axe has been utterly devoured and replaced by a variety of fruiting fungi. Gills funnel the axe’s blade, holding millions of spores in biomantic suspension, ready to unleash their pain-inhibiting effects when inhaled.
  Painblind Spores. As a bonus action while you hold this axe, you can inhale its spores, numbing your extremities and stimulating muscle recruitment. Until the start of your next turn, melee weapon attacks you make with this weapon have a +2 bonus to damage rolls and you have resistance to bludgeoning, piercing, and slashing damage.
  If you use your bonus action to inhale more spores at the beginning of your next turn, the effects continue without interruption. You can prolong the effects in this manner for up to 1 minute, after which the effects end. When the effects end, you become poisoned for a number of minutes equal to ten times the number of rounds you were under the influence of the spores. Once you have benefitted from the Painblind Spores, you can’t benefit from them again until after you finish a long rest.
  Rare variant: Increase the bonus to + 3. While under the influence of the Painblind Spores, you have advantage on Strength and Constitution checks as well as Strength and Constitution saving throws. You can benefit from these spores once per short or long rest.