School of the phoenix

You are a special type of wizard some people call you a warlock but no you are a wizard. You study a mastery of evocation, abjuration, and conjuration. You study evocation to fight for the principles of the phoenix, you study abjuration for protection from any mishaps that may occur, and you study conjuration to create and summon the magical effects of the phoenix, and rarely, the phoenix itself. Few have ever gotten far enough, because it means certain death, revulsion of elemental powers, or to accidentally burn your allies. But those who have, have become kings because of becoming a true phoenix lord. 

Thunder or Fire

Starting at second level you gain the ability to choose Lightning or Fire of the phoenix

 

Fire

Fire: Starting at level two you gain the ability to make weapons out of fire, you can create a small sword, axe, or spear out of fire, such weapons have the light and thrown properties. This lasts for 1 minute, and when you make melee weapon attack with one it deals 2d8 fire damage on a hit, and on a miss it deals 1d4 fire damage. When it is thrown, it lances into a blaze of fire, every creature within five feet of it make a dexterity saving throw against your spell save DC or take 3d8 fire damage, if they succeed they take only have damage. This damage increases by 1d8 at levels 5, 10, 15, and 20.

Lightning

You gain proficiency in light armor and simple weapons and all weapons you hold count as magical for the purpose of overcoming resistances and immunities.

Thunder or Fire 6th level

At 6th level you can choose whether to harness the amazing lightning abilities of the phoenix or the passionate fire abilities.

Fire

Fire, when you get hit by a melee attack you strike a hostile creature you can see with a fire ball of minute size, it makes a dexterity saving throw- disadvantage if it is not the target that hit you -against your spell save dc and takes 3d8 damage on a failed save and half as much on a successful one. 

Lightning

You feel the power of the Lightning imbue your armor. You gain the ability to weave magic into your armor,  while wearing light or medium armor your armor class increases by 2.

Thunder or Fire, a pseudo-phoenix.

You gain the following properties when casting a fire or lightning spell- +2 armor class and can't be hit by magic missile, the spell overcomes spells and effects such as barkskin, mage armor, or shield, you gain resistance to all damage and immunity to lightning and fire until end of your next turn.

Thunder and Fire: the True Phoenix

You gain access to all thunder and fire properties.