Slayer Deeds
From Ultima Online Forever Wiki
Description
Slayer deeds were added in January 2018 to create a new method for players to apply a slayer property to runic weapons. They are available via the Tinkering menu and can only be applied to runic blacksmith weapons. Unlike normally crafted slayers, the deed applies a limited number of slayer charges to the runic weapon and will break when the charges are exhausted. 120 Tinkering is required to be able to create these deeds.