Looking for a low CR creature with Animate Dead as SP ability

[Shin Okada]

For the next game, I am looking for a creature who can provide free troops for an army, I mean, something who can use Animate Dead as a spell-like ability (thus, no need of material component).

As that is a 10th-level adventure, Ak'Chazar Rakshasa (CR 15) is a little bit too strong. Some spell-stitched undead may work, but only few have WIS 15+ and they often can't become spell-stitched by themselves.

Any Idea?

 

[Voadam]

The Fiend Folio has Maurezhi Tanari, a 5 HD, CR 9 ghoul demon with animate dead at will.

 

[Voadam]

In 3.0 the CR 6 5HD Osyluth bone devils could animate at will as well. Along with Barbazu, Erinyes, Hamatula, Cornugon, etc. (They became physically tougher in 3.5 but lost lots of spell like abilities.)