This was first available during the Advent of Decay wave, where it appeared in the "Dark Forces" weapons pack. Sometimes it comes with a removable skull on top, other times it has been included without the skull.
Besides that set, this weapon has been repainted and included with:
- Deluxe Barbarian LB (no skull included)
- Deluxe Female Orc Builder (no skull included)
- Goblin Legion Builder
- Krotos (no skull included)
- Lord Draguul