Jason Mask

Jason mask is a helmet with two distinct versions: one regular version, available in all worlds during the Halloween event, and another, advanced, available at any time in the single-player Underground World.

Halloween
A regular jason mask may drop from the parachuted boxes during Halloween.

It can also drop from pumpkin plants.

This item cannot be purchased and it is not craftable.

Advanced
Advanced jason masks have no relation to the Halloween period.

Killing the Keeper of the Altar in the Underground World may reward the player with zero to four advanced jason masks.

This version provides more armor points without increasing the agility penalty to the dwarf wearing it: thirty armor points instead of the twenty-four of the regular version.

Drop Probabilities
The Shaman drops have four separate rolls with 50% chance each to drop a jason mask, which will result in the following probabilities:

I.e.: 93,75% chance of getting at least one advanced jason mask after killing the Keeper of the Altar.