Its got a callback to the old, hardly used and hardly usable Rampage mechanic, and since Marhaults time in 1993, hes presumably cut that horrible ponytail and traded in his sword for a bow, as well as ditched the flavor text that reads like Dashboard Confessional lyrics: No chance observer could imagine the rage in his heart. Woof
The rare version, Glistening Oil does the same recursively, but slowly shrinking our creatures will often feel bad and can backfire
For example, I can equip [c]Gingerbrute[/c] with [c]Mace of the Valiant[/c], so that it now has both haste and vigilance
The new Hades has a cool effect that gives your opponent a difficult choice
This slots into Varina and Wilhelt builds for sure, but it could just be a great commander in its own right