Magma Domain

This was made as a sort of counterpoint to another homebrew class I saw on Instagram. Let me know what kind of changes i should make!

Enhanced Mold Earth

When you choose this domain at 1st level, you gain access to the Mold Earth spell, with the following changes 

• You can perform a long ranged spell attack on any creature within 30 ft. This damage can be piercing, bludgeoning, slashing, or fire damage.
• You can use an action to cause magma to begin flowing around you in a 10 ft circle, dealing half your player level of fire damage to every creature within range at the start of their turns. 
• You can move stone as if casting stone shape, with a limit based on the parameters of the cantrip in terms of size. 
• You gain tremorsense within 30 ft of you. 

Bonus Resistance

Starting at 1st level, your attunement to the element of fire has caused your skin to become fire-retardant, giving you fire resistance.

Channel Divinity: Sweltering Heat

Starting at 2nd level, you can use your Channel Divinity to damage your enemies. 

As an action, you present your holy symbol and cause a sweltering heat to form in a 20 ft circle around you, causing creatures within range to take 5 extra points of fire damage with each fire attack you make. This effect last for 1 minute, unless you use a bonus action to end it.

Improved Mold Earth

Beginning at 6th level, you gain the following changes to the move earth cantrip.

• While concentrating on mold earth you can still use it as a damaging cantrip.
• you can cause a giant hand of earth and stone to strangle a creature within range. Make a check using your spell casting modifier against the creature Strength save. This lasts for 1 minute. This is concentration. 
• You can now bend metals as well as earth and stone
• You can cause a metal object within range to heat up, causing a creature in contact of it to gain disadvantage to attacks and ability rolls. This effect lasts for 1 minute. This is considered concentration

Potent Spellcasting

Starting at 8th level, you add your Wisdom modifier to the damage you deal with any cleric cantrip, and you can make two attacks when you take the attack action on your turn.

Phoenix Rebirth

Starting at 17th level, when you would take fire damage, half of the damage dealt will become healing energy upon you. If you are attacked with fire within one round of your death, you return to life with hit points equal to half the damage dealt.