The material below is Open Game Content from a 3PP Source
School necromancy; Level antipaladin (4W) 3, cleric 3, sorcerer/wizard 4, witch-4wfg 3, witch 3
Casting Time 1 standard action
Components V, S
Target creature touched
Saving Throw Will negates; Spell Resistance yes
You place a curse on the subject. Choose one of the following.
–6 decrease to an ability score (minimum 1).
–4 penalty on attack rolls, saves, ability checks, and skill checks.
Each turn, the target has a 50% chance to act normally; otherwise, it takes no action.
You may also invent your own curse, but it should be no more powerful than those described above.
Bestow curse counters remove curse.