[Snake]

Shambling Mirage - For whatever reason, your warped psyche's illusions always show up and act like eldrich abominations. Invite Insanity's butterflies become a mass of darkness instead, and will only ever try to inflict Confusion. The success rate is boosted by 10%, the duration by 1 rounds, and the LV of it by 10, as a result.

As for the Phantasm, it could be a good idea for it to have some sort of drawback related to it. Like, each Mirage changes the Papilion's elemental weakness to something else other than Earth. (The Snake one changes to Poison. The Fairy one changes to Dark. The Shambling one changes to Light. The Pidgeon one changes to Wind. etc.)