D&D 5E 1st Attempt at a CR 20 BBEG+New Race Critique.

[Zardnaar]

Yeah, his offensive CR if he just uses his multiattack is only 13. An extra attack only bumps him up to a (non-spell) offensive CR of 15. Leaving it at four attacks and giving him an extra damage die instead moves his non-spell offensive CR to 16. EDIT: forgot to switch from spell save DC to attack bonus (which is much higher than his DPR would suggest) when I originally posted this.

His offensive CR is all in the meteor swarm. If a level 20 party manages to avoid it, he's going to need to have minions with him or a favorable environment in order to present a challenge.

I look at CR 20 more for level 13-15 PCs not level 20.

 

[Zardnaar]

Yeah, his offensive CR if he just uses his multiattack is only 13. An extra attack only bumps him up to a (non-spell) offensive CR of 15. Leaving it at four attacks and giving him an extra damage die instead moves his non-spell offensive CR to 16. EDIT: forgot to switch from spell save DC to attack bonus (which is much higher than his DPR would suggest) when I originally posted this.

His offensive CR is all in the meteor swarm. If a level 20 party manages to avoid it, he's going to need to have minions with him or a favorable environment in order to present a challenge.

I look at CR 20 more for level 13-15 PCs not level 20.

How about an extra attack and the extra dice of damage?

 

[Ath'kethin]

Epic NPCs EN5ider 45.

Ahh. Thank you. I didn't even think to look in that one.