you won't consistently get a knolan and a shadow damage 1 cost spell in the deck (warlock or priest obvious choices)
however knolan WILL make omedus-style priest VERY powerful... VERY
turn 1: touch of darkness, knolan, turn 2: mind spike, knolan (statistics kicks in and this happens 1/20ish games) turn 3: shadowfiend, knolan, questing time (1/100 games)
imo should've been unique, but it's cool horde got an adam eternum equivalent (in a wierd way)
there are 3 types of lies; lies, damned lies and statistics