At sunset combine the vinegar, mint and vanilla pods in a bowl wrapped with the silver wire. At midnight, lay the onyx into the bowl and add the gelatinous cube and the blood of the ritual participants. Speak the words: "Chromatic Dragon, conquer us our weakness. Mother of Dragons we take from you this blessing." Beware that Tiamat may hear your prayer, and send her minions to stop you. Participants must remain awake and on watch. If the ritual components are destroyed, it must be restarted anew.
At dawn, pour the Health Potion over the onyx. Wrap the onyx in clean silk.
The spell invisibly inscribes the symbol of Tiamat onto the onyx stone.
When you are within 100 feet of Tiamat, you may use an action to speak the words of the spell again and crush the onyx. Tiamat's black head will fade to grey, and be weakened.
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