Very straight-forward: When a sylvari transforms into a juggernaut, give it the [OVERGROWN TONIC] skin from TA. Would be very boss and make lots of sense. Gets giant, hardens into wooden armor, tears everything up. I’d run. The husks before nightmare wurm already have the skill animations too, could be easy to combine.
This another suggestion towards immersion, step one of course is to make oakhearts aggro when you harvest trees near them I got a million great ideas to bring the world to life.