The Warlock

I had an idea, warlocks.
A warlock is a warrior source.

Starting Level
+d10 wounds, 2 weapon use, +2 to all pool to hit.

Level Advancement
+d10 wounds, 1 weapon use, +1 to all pool to hit.

Essentially, this source would automatically increase the combat abilities of a mage or priest. The pool to hit modifier only applies when rolling a war, checks are unaffected.