Diabolists for the Realms

The Diabolist is the paradoxist who serves the forces of the Outer Planes, Limbo or the Netherhells.  Diabolists generally have a patron demon but pay homage to whatever evil being will give them power.  Diabolists are intended as an NPC class.

Diabolists advance and Fight as Clerics or by HD type if a monster is applied the Diabolist "template".  They have no weapon restrictions and gain skills as Clerics.  Diabolists may use all Clerical magic items.  Diabolists may be of any Evil Alignment.  A diabolist whose alignment becomes good forever loses his diabolist levels and abilities.  Taints remain however.

Diabolists get access to a wide range of spells, depending on the being with whom they are communing. A general chart follows :

Worship              Grants                       
Demogorgon        Reversed Clerical and Magic User spells
Jubilex                Magic User and Druid Spells
Yeenogu             Reversed Clerical and Illusionist Spells
Orcus                 Clerical, Reversed Clerical Spells, Illusionist Spells
Slaadi Lords        Illusionist Spells, Magic User Spells
ArchDevils (et al)    Reversed & Clerical Spells
Lolth                  Clerical and Magic User Spells
Demodands        Reversed Clerical Spells
Daemons            Druidic and Magic User Spells
Elemental Lords   All Spells of their Element plus Druid
Outer Gods         All Spells
Old Ones            All Spells
Great Old Ones   All Spells
Elder Gods         All Spells
Misc Demons     Any 1 category of spells (clerical, druidical, magic user or illusionist)

Diabolists get d8 Hit Points each level and stop at 10th , and can use spells by the following chart:

Hit Die                     Level        1st    2nd    3rd    4th    5th    6th    7th    8th    9th
Less than 2HD            1             1
2 HD                        2-4           2       1
3 HD                        5-6           3       2        1
4 HD                        7-8           4       3        2      1
5 HD                        9-10         5       4        3      2       1
6 HD                       11-12        6       5        4      3       2       1
7 HD                       13-14        7       6        5      4       3       2       1
8 HD                       15-16        8       7        6      5       4       3       2       1
9 HD                       17-18        8       7        6      5       4       3       3       1   
10+ HD                   19+           9       8        7      6       5       4       3       2      1

Diabolists take damage from Holy Water (1d4) and Holy Artifacts (2 per round) and may not cross magic circles.
All Diabolists are 10% likely per level to suffer some form of Demonic Taint and Demonic Boon.
Use your favorite Chaos and Mutation charts.