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:
The spell Touch of Madness acts as a Berserk of level 0 meaning the only benefit is being unable to route.
What is the morale check? Will berserked innate casters continue to cast?