Boon of the Gods

You burn the godly ichor after casting the spell, causing all deities to hear your request. One god of your choice is required to fulfill your request, however, they must give you a challenge. The challenge is left to the DM to decide (Within reason, don't have them slay Gods all willy nilly). You will be given seven day to fulfill the specific gods request, and if you complete the quest, you will be given anything of your desire. If you don't complete the challenge in seven days, the god will take your soul, and you will be claimed as their eternal servants. Upon obtaining the reward, the knowledge of the spell is burnt from your mind, and any notes or writing you have on the spell disappear.