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D&D 3E
what's the formula to add up CR's of multiple creatures? i'm… 
22nd-Dec-2003 03:14 pm
what's the formula to add up CR's of multiple creatures? i'm scratching down some encounter notes and i left my dmg at home. i know two CR2 creatures don't make one CR4 encounter.
22nd-Dec-2003 12:27 pm (UTC)
Thats the way I usually do it.
22nd-Dec-2003 12:27 pm (UTC)
waiot strike that... I usually determine the XP of 2 CR 2 creatures. The Xp is done individualy.
22nd-Dec-2003 12:32 pm (UTC)
There is a formula, somewhere, I think. It is only really relevant when the PCs run into a large number of lower-levelled chreatures, who are too far below their own level to be worth any XP.

I believe its something like 4 CR X = CR (X+1).

22nd-Dec-2003 12:34 pm (UTC)
it matters this time because they're 3rd level characters going up against a bunch of kappa and kuo-toa, both CR2. need to add em up. one at a time they're no big deal, but i'm gonna mob em at the end.
22nd-Dec-2003 12:38 pm (UTC)
Are you trying to determine the Encounter Level (EL) of a group of CR creatures. If they all have the same CR then doubling the number of creatures adds two to the CR. So, in your example, 2 CR2 creatures do make an EL4 encounter. 4 CR2 make EL6, 8 CR2 make EL8, etc. It sort of breaks down after about 25 creatures increasing the EL by 10.

Hope this helps,
22nd-Dec-2003 12:39 pm (UTC)
that is what i meant, and that does help, thanks.
23rd-Dec-2003 01:56 am (UTC)
The DM guide has a huge chart that works out what EL different CR's make - just look up EL in the index you can't miss it
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