The spell is cast on the world map. A potion of magic is given to all units belonging to the player. All units have increased health (hitpoints). The amount is 10% of the casters intelligence rounded down. This will normally be 1-3 hitpoins. (May need some balancing this one, but my point should be clear). This should be rather expensive manawise, but would be a way for a spell-focused player to get some more ooomph in his/her forces.
