What is your favorite ultimate ability for that class?

The Sylvan faction, and the heroes of this Castle, have absolute luck. I remember the first time I saw this skill (in the original 5th installment), I was amazed. Constantly attacking with luck – that's what I'm talking about. Just imagine Master Archers under this skill, shooting point-blank at anyone.

It's just that Urgash's Call is very difficult to upgrade... I tried using ArtMoney to do it, but it didn't work. Instead of fire arrows, it always gives speed magic. But, for example, Tactical Expertise is quite easy to upgrade, and I think this imbalance is not good.