could be just bad luck/judgement on my part but higher tier beasts seem less and less useful...
would be nice if the evolution map gave some hints about the form's abilities
Intelligent Sword (Flying Scimitar/Dancing Weapon) - only takes half damage as a passive ability (or an ability you turn on and stays on till you leave the level), slash, thrust (longer range, less damage)
Shade (Shadow) - touch attack (possibly paralyzing for a very short duration or paralyze as a separate power), invisibility
I havent managed to unlock all characters yet, but it seems several characters are just there as fillers for the slots, so I'd like to suggest a few characters. again, I havent managed to unlock them all yet, so if some of these already exist (or there is no similar sprite) just ignore:
(The) Disembodied Hand (That Strangled People) - melee only, invisible by default but becomes visible when attacking. if its too hard to script just give it an invisibility power
Vampire - bite attack that replenishes health if it hits, confusion/mindcontrol, darkness
Cake - It is a Lie!
Troll - passive (slow) regeneration (possibbly an ability you turn on and stays active until you leave the level), some melee attack
Kitten (black, of course) - claw attack, purr (calms enemies in a short range for the duration or until they are attacked, making them stationary and disabling abilities (disabling AI))
Looks good (though so far most classes/creatures seem useless beside the necromancer) but you should really give the y key the exact same function as z key. on several keyboards these two buttons are swapped... try playing with z instead of z... ouch
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 "Great Dungeon in the Sky"){kind=icon}