Arcane Avatar

While you are touching a Mythallar you are attuned to you can use this spell to fuse with the Mythallar and enter a state of arcane supremacy. Your appearance becomes a starry void and you gain the following effects.

• All spells you know are considered prepared.
• You have resistance to all non-magical damage you take.
• You have advantage on any saving throws made against spells or other magical effects.
• You gain a flying speed equal to your movement speed.
• You can squeeze through a gap as small as one inch.
• You have 30 ft. of true sight that extends into the ethereal plane. You know if anything within your true sight is magical, and what school of magic it is.
• Whenever you cast a spell that does damage it deals an additional 2d10 force damage the first time it does damage.
• A creature killed by a spell you cast is disintegrated the creature and everything it is wearing and carrying, except magic items, are reduced to a pile of fine gray dust. The creature can be restored to life only by means of a true Resurrection or a wish spell.
• When you cast a spell of 1st level or higher each creature within 10 ft. of you takes force damage equal to your intelligence modifier and must succeed a strength saving throw or be knocked prone.
• You can use your Arcane recovery feature as an action.

After this spell ends you become both mentally and physically exhausted. All attack rolls and ability checks you make are made with disadvantage, your speed is halved and you cannot concentrate on any spells until you complete a long rest.