Atropal in 5e

[Specter]

So, I'm going to be using anAtropalas a boss in an upcoming campaign. Yes, these guys:

http://forgottenrealms.wikia.com/wiki/Atropal

Has anybody homebrewed one of those in 5e already? If not, how would you do it?
Thanks in advance.

[Cespenar]

Convert it from 3.5 Epic Level Handbook?