Lucrayzor put it very well. Dragulus does get some nice advantages when it is awoken. Bloodthirst one-shotting after just 1 kill is probably the biggest one. The 70TU knockback in the SS is the next biggest I think (it’s only +1 cost to add).
When you compare Dragulus (15 cost) against Shadowyrm (15 cost) there is an absolutely enormous advantage Dragulus has. It’s definitely worthy of the mythic title.