Easter Egg In Birchbark Oakleaf's dialog, look for a reference to another famous treant. ;)
I was able to convince Birchbark Oakleaf, an ancient treant rooted deep within the soil of Deadwood Refuge, that repairing the damaged Ulteran Spires is in the best interest of the entire island, including his copse.
Steps[]
Gather 8 scattered pieces of the broken Ulteran spires. (General area: ( -101, -26, 126 ) Copy/waypoint -100.52, -26.19, 125.72)
Click the scattered bluish-grey rocks with sparkling runes.