Multiple Creatures and Challenge Rating.

[Angel Tarragon]

I have had a momentary relapse. Can someone please point out how to calculate the CR of multiple creatures all sharing the same CR (i.e, 6 CR6 opponents)?

 

[ValhallaGH]

+2 EL for each doubling of number.

CR 8 monsters.

1 = EL 8

2 = EL 10

4 = EL 12

8 = EL 14

16 = EL 16 (not actually challenging to PCs)

etc.

Note that you do reach a point where they become ineffectual. They can't hit ACs, or PCs will make their saves 95% of the time, or the monsters will fall to a single blow or area of effect spell.

According to the DMG, hand out XP for each individual moster as appropriate to its CR. So level 16 heroes facing 16 CR 8 creatures get 0 xp, since anything 8 CRs below your level is not worth any xp.

 

[Angel Tarragon]

Thanks for the reminder ValhallaGH!