Turn Undead
The cleric makes a Turn attempt and rolls 1d6 / cleric level. All undead in the area of effect must make a Will save vs a DC of 10 + Cleric's level + Cleric's Cha mod for half damage. Undead with turn resistance may add that bonus to this save. Any undead reduced to 0 or fewer hit points are destroyed. If an undead takes damage equal to or greater than 1/2 its current remaining hit points, it is considered turned and acts accordingly.
Rebuke Undead
The cleric makes a Rebuke attempt. All undead in the area of effect must make a Will save vs a DC of 10 + Cleric's level + Cleric's Cha mod or cower for 10 rounds. Undead with turn resistance may add that bonus to this save. Attacks against cowering undead gain a +2 on their attack rolls.
Command Undead
To command undead, an evil cleric (or neutral cleric who has chosen to rebuke rather than turn undead) must make a turn attempt. All undead in the area of effect must make a Will save vs a DC of 10 + Cleric's level + Cleric's Cha mod. Undead with turn resistance may add that bonus to this save. Intelligent undead may also add their Intelligence modifier (if positive) to the save. Any undead failing the save is commanded by the cleric.
Bolster Undead
An evil cleric may spend a turn attempt to bolster undead within the area against turning. For each turn attempt the cleric spends, all undead in the area gain turn resistance +1, or have their turn resistance increased by 1. The cleric may not increase any particular undead creature's turn resistance by more than +3 with this ability.
Dispel a Turning Attempt
If an evil cleric (or neutral cleric who has chosen to rebuke rather than turn undead) wishes to dispel a turn attempt made by another cleric, he must make an opposed turn check. He rolls 1d6 / cleric level. If his total is higher than the original turn check, the turn attempt fails. If he rolls lower, or the two values are the same, the turn check succeeds, and undead in the area of effect must save for half damage.
If a good cleric wishes to dispel a rebuke, command, or bolster attempt made by an evil cleric (or neutral cleric who has chosen to rebuke rather than turn undead), both clerics roll 1d6 / cleric level. If the good clerics total is higher than his opponent's total, the dispel is successful. Otherwise, the opposing cleric's attempt is made normally.