Get your Basalisk into the Chamber of Secrets

Apeneo: Clears the target's airway, if blocked
Descendo: Makes objects sink, or go down
Duro: Makes an object hard
Engorgio: Causes objects to swell in size
Erecto: Used to erect something
Flagrate: With this spell, the caster's "wand" can leave fiery marks
(Hair Loss Curse): Causes one to lose one's hair. (where ever needed)
(Hair-Thickening Charm): Thickens one's hair (if you like that sorta thing)
(Hot-Air Charm): Causes one's "wand" to emit hot air
Lumos: Creates a narrow beam of light that shines from the "wand's" tip
Reducio: Makes an enlarged object smaller
Serpensortia: Conjures a "serpent" from the spell caster’s "wand"
Specialis Revelio: Causes an object to show its "hidden secrets" or "magical properties"

This is all i could find. If you have any more feel free to share

Wouldn't Expecto Petronum cause something vast and silvery to be emitted from the 'wand'

This is true... and it could even make an "animal" come out if you're that happy

heheheh, and you always need a 'happy' memory to summon it.