cosmic terrain

A cosmic terrain filled with pure and raw power built up within the soul of the user in a 60 ft spherical dome. The user is also levitating 15 ft off the ground protected in a dome (7 ft by 7 ft by 7 ft) of magical energy and cannot be dispelled, Any creature that attempts to destroy the dome (or harm the user of the spell) that the user is in, the creature takes 2d4 force damage and is knocked prone. No creature can enter nor exit the dome by any means and if they try, the creature takes 2d4 force damage and is knock prone.

Every creature within the 60 ft dome (but not the user) takes the following damage every round: 2d6 radiant (an extra 1d6 against all types of evil and undead), 2d6 necrotic (an extra 1d6 against divine beings), 2d6 fire damage (an extra 1d6 fire damage on the next creatures turn), 2d6 cold damage (the creatures movement speed is reduced by 10 ft), 2d6 Acid (an extra 1d6 damage against machines), 2d6 Lightning (creature must make a CON saving throw of 15 or to be paralyzed until the creatures next turn), 2d6 Poison (creature must make a CON saving throw of 16 or to take an additional 1d6 poison for 1 hour), 2d6 Psychic (creature must make a WIS saving throw of 11 or to have disadvantage on all saving throws).

during the spells duration every 15 minutes the user takes 10d4 necrotic damage and one point of exhaustion. Spectral mirages (see the creature sheet in home brew page) appear every 15 minutes surrounding every creature in the dome (5 for each creature).

NOTE: This spell uses all spell slots, and every already used up spell slots deals 2d4 necrotic damage to the user of this spell. every used spell slot for this spell increases all damage (but not already used up spell slots, and damage from every 15 minutes) by 1d4 of that damage type (even force damage).