Hermetic Theurgy and Opening the Intangible Tunnel

Can you invent Hermetic Theurgy Invoke the Spirit of spells at range touch and then cast them through Opening the Intangible Tunnel? Why or why not?

Among other shenanigans, this might allow you to invent Invoke the Spirit of spells at range Touch duration Moon.

Or might allow a level 5 Invoke the Spirit of spell (touch, momentary, individual) to summon a spirit able to produce a level 20 effect.

Probably a good thing that you can't spontaneously cast Hermetic theurgy spells!

Also other posts say that Hermetic Theurgy is weak, and this might be a way to give it a needed boost?

Well you can cast a spell of your own through another magi's tunnel as long as you are within range and can sense it, so I would assume spell spirits are subject to the same limitations. Spell spirit location is abstracted but I would assume you could summon one at touch range to you if you wanted to. Now all that remains is weather spell spirits can sense arcane tunnels, but iirc second sight is a component of the magical spirit template, so I'd say it's probably fine. If you're feeling mean as a gm you could require a check by the spirit, but since you have to take a turn instructing the spirit to get it to cast the spell it shouldn't be very hard imo

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