1. Accept the Quest: "Azsharite Experiment Number Two"
2. Create a macro:
/cancelaura Shrunkified
/cancelaura Riding a Rat
3. Set it to a keybind.
4. Click on the Rat and the macro.
5. When the buffs disappeard it worked.
6. You can take it overall in Kalimdor.
You cannot cast spells, take it to another maps, instances and battlegrounds.
ENJOY