A berserker must make a morale check every time they take damage, or become berserk.

A unit that has gone berserk will appear to gain a red pulsing glow. It will not cast spells or follow orders: it will instead run forward and attack the nearest enemy. It will not retreat, not even due to the turn timer, and its morale is set to 99. The berserk state is cancelled if its fatigue reaches 100, though this does not prevent a unit berserking again once its fatigue falls. A unit that has gone berserk also gains fatigue per round (in a similar mechanism to exhaustion) equal to the (1 + berserk value)/2, rounded down.

The value of the berserk ability are the modifiers applied during berserking, which are:

• Added to the unit's attack skill
• Added to the unit's strength
• Added to the unit's natural protection
• Subtracted from the unit's defence skill

The spell Touch of Madness acts as a Berserk of level 0 meaning the only benefit is being unable to route.

Mounted units may not berserk, except for the special hero Cu Chulainn of MA Eriu. You need the tag "mountedbeserk" to go berserk as a mounted unit, which currently only he has. However, they're still affected by items which directly apply the "goneberserk" tag such as Lycanthrope Amulets.

What is the morale check? Will berserked innate casters continue to cast?