Wrath of The Dragon Queen

Before casting make a DC 10 CHA check on a failure you are completely immolated taking 20d10 fire damage if this damage reduces you to 0 hit points your body disintegrates. You unleash Tiamat's fury. The area within 40ft of you bursts with lava and fire this area is difficult terrain and any creature that starts its turn in the area takes 20d12 fire damage. The next 40ft are covered in lightning storms any creature that starts its turn in this area takes 19d10 lightning damage and must succeed on a CON save or be stunned for 1 minute. The next 40ft are covered in toxic fog any creature that starts its turn in this area takes 18d8 poison damage and must succeed on a CON save or be poisoned for 1 minute. The next 40ft are drenched in acid rain any creature that starts its turn in this area takes 17d6 acid damage and must succeed on a CON save or be blinded for 1 minute. tThe last 40ft are covered in frigid wind any creature that starts its turn in this area takes 16d4 cold damage and must succeed on a CON save or be paralyzed for 1 minute. All areas are heavily obscured. When the spell ends make a DC 20 Arcana check on a failure the area of the spell becomes a portal to release Tiamat.