Abilities wishlist:
Polymorph
Simulacrum
Shadow clone
Fists of Fire
Meditated attack - bonus damage on next attack that accumulates 15% for each round you meditate on it. Make it exponential for added fun 
Hurl foe
Opportunism - auto attack adjacent foes who attack someone else, with a bonus to hit
Snatch arrows - lowers missile attack hit chance for you and adjacent squares
Deflect Blow - next attack on you will randomly hit someone else
Magically Inspired - attacks gain 20% of the damage of the last spell cast on the battlefield. Healing spells included
White Knight - offense increased when adjacent to a friendly unit below 30% HP
Bullrush - attack and push back a unit if possible
Sore Loser - bonus to damage if last attack missed
Opportunistic Trip - attempt to knock down anyone trying to go past you
Undercover - cannot be targeted before attacking for the first time
Mimic - can replicate the last special ability used in the battlefield
Role Model - gives army wide bonus/penalty for hitting/missing
Grapple - lock an adjacent unit in place, so that it is unable to move (but can attack)
Better than ever - dying grants +15% XP