Black Mage - A FFXIV Inspired Class

Black Mages wield great power, commanding the forces of ice, fire, and lightning.

Become a Black Mage and send calamity upon your foes! Based on the job from FFXIV, this claim faithfully recreates the abilities of a black mage. Manage and master Astral Fire and Umbral Ice to create unending destruction.

Black Mage Progressions|

Mana: Each spell costs mana to cast. Mana will refill by 5 every turn while under Umbral Ice and after a long rest.

Polyglot: Up to 3 polyglots can be held at a time, and one can be gained per short rest from Amplifier.

Umbral Ice: 

When using an Ice spell, recover mana and lower the cost needed to use both Fire and Ice spells to 0.

1 Stack: 25MP

2 Stacks: 50MP

3 Stacks: 100MP

When using a Fire spell, your damage will be reduced for each stack.

1 Stack: -2 damage

2 Stacks: -3 damage

3 Stacks: -4 damage

Astral Fire:

When using a Fire spell, you will deal an additional 1d4 damage for each stack while increasing its mana cost by double.

When using an Ice spell, your damage will be reduced  for each stack but Ice Spells will cost no mana.

1 Stack: -2 damage

2 Stacks: -3 damage

3 Stacks: -4 damage

=Thunderheaded: When switching between Astral Fire and Umbral Ice, you will gain Thunderheaded, which is needed for Thunder spells.

=Umbral Heart: Nullifies Astral Fire's MP cost increase for Fire spells and reduces MP cost for Flare, instead costing all remaining Umbral Hearts.

=Firestarter: Your next Fire III spell costs no mana.

=Astral Soul: 6 stacks are needed to cast Flare Star.

Black Mage Spells|

1:

 Fire: Deals 1d10 fire damage to a target. Deals an extra die at level 5 and 10. Grants Astral Fire, or removes Umbral Ice.

Blizzard: Deals 1d10 cold damage to a target. Deals an extra die at level 5 and 10. Grants Umbral Ice, or removes Astral Fire.

2:

Transpose: Swaps Astral Fire into one level of Umbral Ice or vice versa.=====

Thunder: Deal lightning damage equal to your spellcasting ability modifier +1 to an enemy. Deal 1d4+2 lightning damage at the start of each turn for 3 turns to them.

Scathe: Deal 1d6 force damage to an enemy. 

3:

Fire II: Deals 1d6 fire damage to enemies near a target. Deals an extra die at level 5 and 10. Grants Astral Fire III, or removes Umbral Ice.

Blizzard II: Deals 1d6 cold damage to enemies near a target. Deals an extra die at level 5 and 10. Grants Umbral Ice III, or removes Astral Fire.

Thunder II: Deal lightning damage equal to your spellcasting ability modifier  to enemies in an