Which monster do you like the most in Heroes 5 (level 4)?

by the way, about mages... I was playing a duel against the computer, and I got the Oracle...
and my mages (alternative upgrade) damaged the golems with a shot, which were mine =(... how is that possible? if they shouldn't harm their own units...

P.S. on the topic: out of all four tiers, I like Mages and Griffins the most =)