What would your special unit be able to do?

[John3:16]

Somewhat along the lines of what necrocat posted, maybe a unit that buffs? I'll call it the Schwarzennegar

Swarzzenegar:

Ability: buff a unit to either:
- Do 1 more damage next hit
- Move 1 more hex next move
- Take 1 less damage next hit
- Gain 2 (1?) more visibility (stays unless placed on another unit)

Each buff can only be placed on one unit at a time

Complicated game mechanics, which is probably against the game design sensibilities of OML.