Okay. This topic makes me want to recreate the Cosmic Sorcerer. But should I go with the same 3 phases like 4th edition?
Phase of the Sun (blunt and loud, favoring blasting and fire)
Phase of the Moon (subtle and reactive, favoring enchantment and alterations)
Phase of the Stars (distant and intelligent, favoring divination and psychics)
Or should I add more: Phase of the Comet, Phase of the Void
4 would be good to match the 4 temperaments (Sun- Choleric, Moon- Sanguine, Void- Melancholy, Stars- Phlegmatic)
Soul of the Cosmic Cycle
Starting when you first take this origin at the 1st level, your spellcasting becomes tied to the cycles of the cosmos. At the end of a short or long rest, you choose from a cosmic phase below and gain its benefits.
Whenever you first take damage which brings you under your maximum hit points, your phase immediately changes to the next highest phase (or back to the phase of the sun if you were in the phase of the void).
Also when you cast a spell of the highest level you can cast (for example a 3rd level spell for a 5th level sorcerer), your phase changes at the end of the spell's duration after its effects resolve.
- Phase of the Sun: Any spell you cast which deals fire or radiant damage is empowered as if altered by the Empower spell metamagic. You may choose to empower the spell normally if you have that option. Also you have resistance to cold damage.
- Phase of the Moon: Any spell you cast which may cause a target to be charmed or frightened has its duration doubled as if altered by the Extened spell metamagic. Also you have resistance to psychic damage.
- Phase of the Stars: Whenever an attack misses you or you succeed in a Dexterity saving throw to half damage, you can move up to 15 feet in any direction as a reaction. Also you have resistance to radiant damage.
- Phase of the Void: You can see in darkness, magical or natural, as if dim light and see any invisible objects clearly within 60th feet around you. Also you have resistance to fire damage.
Cosmic Spell
Starting at the 6th level, you can invoke your current phase to cast a spell. When you are in a phase, you can cast this spell as if you know it. In addition, you may choose to not use a spell slot when casting these spell and corvert the necessary magic directly from sorcery points (For example you can spend 3 sorcery point to cast a 2nd level cosmic spell)
- Phase of the Sun: scorching ray
- Phase of the Moon: suggestion
- Phase of the Stars: misty step
- Phase of the Void: detect thoughts
Student of the Cosmos
At the 14th level, you have advantage on certain skill checks when in the corresponding cosmic phase.
- Phase of the Sun: Strength (Athletics) and Charisma (Intimidate)
- Phase of the Moon: Dexterity (Stealth) and Charisma (Deception)
- Phase of the Stars: Dexterity (Acrobatics) and Wisdom (Insight)
- Phase of the Void: Wisdom (Perception) and Charisma (Performance)
Cosmic Concordance
At the 18th level, when you change phase due you casting you highest spell, you my choose to go to the next lowest phase instead (or go you the phase of the void if in the phase of the sun)