You must kill the spirit before you cut a branch

Make sure to have a type of teleportation spell/item out of the island when you are about to sail to Entrana (it will greatly lessen the time it’ll take Ragnarok Online Zeny for you to walk).

Once on the island, go ahead and fletch your ranging items if you prefer to fight the Tree Spirit with bows and arrows. Go northwest from the dock until you see a dungeon.

Head down the ladder (a monk nearby will warn you not to enter the cave). Head in anyways (once you enter, your prayer point will drain down to about 5-15 points).

Kill the zombies until one of them drop a bronze hatchet. Acquire it and maneuver through the dungeon until you see the lvl101 Tree Spirit guarding the Dramen Tree. If you attempt to chop a branch off of the tree or even get close to it then it will attack you.

You must kill the spirit before you can cut a branch off of the tree (you’ll need to make the Dramen staff that Shamus talked about from the bark of the Dramen Tree).

Chop a branch off of the tree with your bronze hatchet and use a knife on it to craft a Dramen Staff. Get out of the island.