How can I add Magic Circle Against Evil to a witch's spell list?

[Alzrius]

One of the NPCs I'm prepping is an angurboda (from Legendary Games' Mythic Monsters #14: Giants) with the witch simple class template (from Rogue Genius Games' The Genius Guide to Simple Class Templates for Monsters), and I'm having some trouble giving her the spells I want her to have.

Specifically, I want to tie this character in with the daemons of Abaddon by way of the soul trade. The witch simple class template gives her a familiar (a la the witch class), and swapping out her Intimidating Prowess feat for Improved Familiar lets me give her a cacodaemon familiar, which gives her access to the crystallized souls, but I also want her to be able to call daemons in order to trade with them. But this poses a problem, since the planar binding spells, along with dimensional anchor and the magic circle spells, aren't on the witch spell list!

Now, her having the Dimensions witch patron (which works well with her being in league with daemonic powers) gives her the planar binding spells and dimensional anchor, but I can't seem to find a way to let her cast magic circle against evil.

Since she's using a simple class template, archetypes are out, and most prestige classes are off the board as well (plus, I don't want to load her up with additional class levels; that's why I used a simple class template to begin with). I can't seem to find any feats that will add that spell to her spell list. Magic items aren't helping either; the ring of spell knowledge seemed like it would do the trick, until we come to the problematic sentence "All of them are useful only to spontaneous arcane spellcasters," since witches are preparatory casters. A page of spell knowledge is less ambiguous in its restriction to spontaneous casters only, and can't let you access spells outside your spell list anyway. Neither does a spell lattice.

Angurbodas have a decent bonus to UMD (+17). Is my best bet to just give her a wand of magic circle against evil and go with that? I'd prefer to give her the ability to cast the spell herself; is there some way to do that I'm unaware of? If so, please let me know!

Please be aware of my use of affiliate links in this post.

[VoodistMonk]

If she is an NPC, just give her the spells you want.

You did it right by applying available templates, even found a Patron to get you most of the spells you are looking for. At this point, just give her the spell. Her build probably is not going to come under cross examination.

[Diego Rossi]

You can give her the spell, as VoodistMonk suggests, without the need to explain how she got it, or you can give her the spells "Protection from Daemons" and "Magic Circle against Daemons" that she researched and invented. They work exactly like the "Protection from Evil" and "Magic Circle against Evil", and have the same levels, but they work only against daemons.

If you want to justify how she had the spell to the PCs, they can even find her research papers and be able to develop the spell themselves with a bit of work. As it is more specialized than the common Protection and Magic Circle spells I doubt they will spend the effort.

NPCs have some wiggle rooms that PCs don't have.