Okay, got one. Actually two.
Tried it: yeah it's kinda strong. But can't see a reason to use him over Gard's Avatar. Spell is the same cost...
After a little Alchemist/Cat looping, I got:
- Ketras: 24 mana, deal c. 80 damage to one enemies
- Gard: 24 mana, deal c. 50 damage to all enemies
Ketras might be preferable for eliminating that pesky BoneDragon... but overall is gonna be slower...
Also: the art rocks, but looks way more daemon than divine... bat wings? daemon runes? glowing red axe?