From Ghostwalk,
Artaaglith(Demon)
5HD LA -- casts as 5th lvl cleric, turn undead as 5th lvl cleric
spell like abilities- 1/day animate dead, cause fear, death knell, desecrate, stinking cloud
tanar'ri qualities
can be summoned by lesser planar ally or summon monster VI
text specifically states spell likes, turning, spell casting stacks with cleric levels