Luocha's tree is the coffin itself (at least, a piece of it)?
In the recent patch, it was revealed that two of the Emanators of Abundance are trees (Evanescia became one after becoming an Emanator, and Shuhu was already described as a creepy tree by Xueyi and Hanya), making me wonder if Luocha is also an Emanator of Abundance (which is very likely, given that he has abnormal healing abilities and can apparently stir a plaguemark). Where is his tree? And how does he get around if he's tied to one place?
Noting that Evanescia likely can't leave Planecardia due to both her duty and her main body being located there, plus Shuhu was going around devouring things with his zombie planet, makes me think Luocha is a similar case of the two. He can move to other worlds because he carries a piece of his main body (probably made by the guy who Luocha promised to carry the coffin to Xianzhou), but since he no longer has any land to gather nourishment from, he use life around him, as shown in his splash arts and trailer, and Tazzyronth fragment as a battery.
Then there would be the problem of why he is trying to kill/absorb him (relapse in trying to return one? Tayzzyronth influence? has he developed his own persona?) and where the whole tree is (either destroyed or located in the field of white flowers that often appear whenever Luocha is on screen).