Avatar Of Tiamat

you try to make a body for Tiamat the dragon goddess, you need a ancient red dragon and 4 other ancient dragons willing or unwilling, while performing the spell on the dragons need to be painted with runes using the special paint, The dragons must be within the spells range throughout the casting time, at the conclusion of which you touch each dragon and make them combine into the Avatar of Tiamat under Tiamat's control using the tiamat stat block.

The transformation lasts for the duration, or until the target drops to 0 hit points. when the spell ends the Avatar of Tiamat dissappears and the five dragons used in the spell appear in a space within 10 feet of where the Avatar stood. If it reverts as a result of dropping to 0 hit points, the dragons appear with 1/4 their hit points.