Winged Neko Spell

Sit down and place the bowl on an even surface. Fill with milk. Add cat hair, a few of the fluffy bottom fibers on the feather, and your hair. Tape a bit of the hair outside the bowl so you don't swallow it. Add the gemstone. Put on the bracelet/ring and dip it without removing it. If you are using a necklace, you don't need to put it on yet. Just dip it. Hold the feather to your heart. Chant:

"This (item) is linked to this soul of mine
Human mingles with avian and feline
Two (colour of gemstone) wings sprout to full size
As their colour fills my eyes.
The ears and tail of a (colour e.g. calico, cinnamon tabby) cat grow in
Replacing my ears whenever they come in
I will have retractable fangs and claws
and a homing instinct if, while flying, I am lost.
My senses will be enhanced and keen
and my tongue will be rough so I can clean
When I wish, my cat parts and wings appear
and when I will them to go, they disappear
Completely human outside and in.
My eyes turn back and human ears grow in.
My instincts and heightened senses stay.
Even when everything else goes away,
when I want to become a winged Neko.
My cat parts and wings will grow
When I need to be a human
My body will return to normal again
This is the wish I ask of thee
This is my will, so mote it be!"

(You can read the spell off your phone if you want.)
When you're done, take the item out. If it's a necklace, put it on. Now drink the bowl. If you can, drink like a cat. Don't drink up the human hair, though! You have to drink the feather parts and cat hair, but don't choke on the gem.

Side effects on my profile. You will be able to turn into a Neko, avian, winged Neko, or just grow fangs and claws, by focusing on what parts of you change.
Be careful, just in case your parts grow in while you're in public! If you feel them growing, focus on staying human.