How is my world Flash unlocking skill?

1, open the game first, as shown in the figure, and click the E key to enter the ability tree.

2. Secondly, click the X key to have a dialogue with Oufu.

3. Then finish the dialogue and click Yes to hone your skills (enter the skills interface).

4. Finally, choose the skill that consumes 800 energy to unlock and upgrade. It is suggested to unlock the order of water breathing, burning and elf sentry.