Adamantine Blanch

This thick gray paste has a gritty texture, as if it were full of metal shavings. When spread over a melee weapon or 5 pieces of ammunition as a bonus action, it hardens and gives the weapon the adamantine property, allowing it to bypass appropriate damage resistances and immunities. After two successful strikes (or one per piece of ammunition), the paste loses its effect. After one hour, if the weapon(s) have not been used for two successful attacks, the effect is wasted. 

Notes: Consumable