Aspect of the Living Forest
Boss
What to know
Aspect of the Living Forest has 1,600 health.
It takes extra damage from fire; poison, spirit and nonplayer do nothing to it at all. Blunt, slash and pierce land at full damage, so that is what to bring.
Its hardest hit is gd king stomp at 150 blunt, out of 2 attacks.
Of everything craftable, 
Staff of Embers, 
Frostfire Crossbow and 
Thunderblood Crossbow put the most damage through what it resists.
Spawn command
With devcommands enabled, this spawns Aspect of the Living Forest in front of you. The third number is the level: 3 spawns a 2-star.
Creature ID: Aspect_Elder · all console commands and IDs