1. Scalding heat eminates from within you. Each creature within 30ft takes 3d10 fire dmg and you regain hit points equal to the sum of fire dmg dealt.
2. You teleport upto 20ft to an unnocupied space you can see. You can activate this effect once on each turn as a bonus action.
3. Conjure 1d4 fire spirits. Each spirit flies in a random direction upto 30ft from you (d12 direction, d6 distance(1-2 10ft, 3-4 20ft, 5-6 30ft). At the end of your turn any creature within 5ft of them must make a Dex save, fail 4d8 fire dmg, half on success.
4. Fire surrounds you, gain +2 to your AC, if a creature hits you with an attack within 15ft it takes fire dmg equal to your Con Mod plus half your level.
5. Earth beneath you opens with elements of the fire plane upto 20ft from you, it is now difficult terrain and follows you as you move.
6. Your body becomes a conduit of elemental chaos. You must concentrate on containing this energy as if you were concentrating on a spell. You can use your action to release the charge, detonating a fireball on yourself. Damage is equal to fireball 6d6 fire dmg 20ft radius, all within range must make a dex save, sucess take half. (plus 1d6 at 5th,7th,10th,12th,14th,17th,20th) Detonating a charge as an action or by losing concentration also ends your rage.
7. Flames engulf a weapon of your choice. Until your rage ends, your weapon deals fire damage instead of its bludgeoning, slashing, or piercing damage, and it gains the light and thrown properties with a normal range of 20 feet and a long range of 60 feet. If you drop the weapon or throw it, the weapon disintegrates and is reforged in your hand at the end of your turn.
8.A beam of brilliant light lances from your chest in a 5- foot-wide, 60-foot-long line. Each creature in the line must succeed on a Constitution saving throw or take 4d8 radiant damage and be blinded until the end of your next turn.