You can cause a creature to become sickened as a melee touch attack. Creatures sickened by your touch count as good for the purposes of spells with the evil descriptor. This ability lasts for a number of rounds equal to 1/2 your cleric level (minimum 1). You can use this ability a number of times per day equal to 3 + your Wisdom modifier.

At 8th level, you can give a weapon touched the unholy special weapon quality for a number of rounds equal to 1/2 your cleric level. You can use this ability once per day at 8th level, and an additional time per day for every four levels beyond 8th.

At 1st level, you can touch one ally and grant him an evil blessing. For 1 minute, this ally deals an additional 1d6 points of damage against good creatures. During this time, his attacks are treated as evil for the purposes of overcoming damage reduction.

At 10th level, you can summon a battle companion. This ability functions as summon monster IV with a duration of 1 minute, but only allows to summon demons. This ability can summon only one creature, regardless of the list used. For every 2 levels beyond 10th, the level of the summon monster spell increases by 1 (to a maximum of summon monster IX at 20th level).