Approximating CR

Hazards by CR

Remember that Tenebrae PCs are essencially APL+2 due to a higher point buy. Also, traps are more fun and interesting when they involve a series of events, and involve more than one PC.

Traps/Hazards/Skill Challenges by CR
Desired CR	Low Saving Throw DC	High Saving Throw DC	Low Attack Bonus	High Attack Bonus	Low Dmg	Medium Dmg	High Dmg
1	9	12	1	2	1d6+2	1d6+2	2d6
2	9	13	3	4	2d6+1	2d6+2	3d6
3	10	14	4	6	3d6	3d6	3d6+2
4	10	15	6	8	3d6+2	4d6	4d6+2
5	11	15	7	10	4d6+1	5d6	5d6+2
6	11	16	9	12	5d6+2	6d6	7d6
7	12	17	9	13	6d6+2	7d6+2	8d6+2
8	12	18	11	15	7d6+2	8d6+2	10d6
9	13	18	12	17	8d6+2	9d6+2	11d6+2
10	13	19	13	18	9d6+2	11d6	13d6
11	14	20	14	19	11d6	12d6+1	14d6+1
12	15	21	15	21	11d6+2	13d6+2	15d6+2
13	15	21	16	22	13d6	14d6+2	17d6
14	16	22	17	23	14d6	15d6+2	18d6+2
15	16	23	18	24	15d6	17d6	20d6
16	17	24	19	26	17d6	19d6+2	23d6
17	18	24	20	27	19d6+2	22d6	25d6+2
18	18	25	21	28	21d6+2	24d6+1	28d6+2
19	19	26	21	29	23d6+2	27d6	31d6+2
20	20	27	22	30	25d6+2	29d6	34d6+1

Skill Challenges by CR

Remember that Tenebrae PCs are essencially APL+2 due to a higher point buy.

Skill Challenge DCs
Desired CR	Ability Check/Very Easy	Easy	Medium	Moderate	Hard	Heroic
1	10	12	16	16	20	30
2	11	13	16	17	21	31
3	11	13	17	18	22	32
4	11	13	17	19	23	33
5	11	14	18	20	24	34
6	12	14	18	21	25	35
7	12	14	19	22	26	36
8	12	15	19	23	27	37
9	12	15	20	24	28	38
10	13	15	20	25	29	39
11	13	16	21	26	30	40
12	13	16	21	27	31	41
13	13	16	22	28	32	42
14	14	17	22	29	33	43
15	14	17	23	30	34	44
16	14	17	23	31	35	45
17	14	18	24	32	36	46
18	15	18	24	33	37	47
19	15	18	25	34	38	48
20	15	19	25	35	39	49