[Calchet]

As Aezeal says, I don't believe a "pick a random unit from this group and summon it" spell can be modded, unless you use the work-around of replacing the units of an existing one, such as the elemental royalty, but then you lose the original spell.

Gil will likely appear as a level nine spell, if included.

In other news, I updated the first post with a new version that adds an additional spell, though I'm not wholly satisfied with the attack sprite of this one, so it'll be revisited in the future.