How many levels does the Royal Guard Warrior Dragon unlock?

1 10 off. Imperial Guard is a 2D strategic tower defense game, suitable for users aged 16 and above. It is recommended that minors use game products under the supervision of their parents. In the endless mode of imperial defense, Zilong is a BOSS monster, which first appeared in 1 10. In "The Body Guard", Zilong has a strong ability to control the field, but it is very fragile. He is strong in the fourth world, so he can't play in the fifth world.