Opalstaff in an easy way by fire trees

So here is tha way I get opalstaff by fire trees.Mobs get hurts in fire.They couldn't destroy the moonbase.

All this happened in ONE minute.Also trees burned out in 45 seconds.That's enough.

My steamID 老司饥.Here are my vedios for DS:https://www.bilibili.com/video/av19878836/

I hope you guys like my artwork.:)