Two spells to differentiate from a standard builder unit, allowing it to be more productive at a cost to its own health.
Pain is Illusion
The Fanatic is infused with his deity's power, allowing him to ignore any wounds for a short time, until his wounds reopen. All damage taken is reduced to zero for a short time (but kept track of). Once the spell ends, the fanatic takes all the damage he avoided in one hit, though leaving him with at least 1 HP.
Zeal
The Fanatic feels the will of his god flowing through his veins, accelerating his movements. Increased harvest and movement speed. Once the spell is over the Fanatic takes damage over time but continues to work at the increased rate for a few seconds.