Red DragonOrb

Object 'orb dragonorb red' type staff, extra flags magic anti-evil anti-neutral good. Weight 5, value 180, level 20. Object Quality (30 / 30 hps) Has 1(1) charges at level 40 'sanctuary'.

Modifies wisdom by 2 continuous.
Modifies intelligence by 2 continuous.

you can find this by killing the red dragon in the sewers.