Spoilers
It literally was what happened before this fight. In Luna
man, with the 1 chapter a week life even last arc was f-ing months ago
He brought untamed fire to thaw the tree from the cold and thus titled to be Savior and was granted the opportunity to touch the tree then see a portion of the future.
Ty bestie
Almost, he was granted the opportunity to touch the tree first, and then the fire thawed the tree and he became the savior.
I forgot the order, thanks!
I dont remember that arc