infinite soul

your very essence has no limits. your soul echoes to the edges of infinity and reaches to the outskirts of the astral plane. you can make yourself untouchable and even send someone to the edge of the universe.

mana wellspring

you get one extra cantrip from the sorcerer spell list, this doesn't count against the number of cantrips you know

limitless

you gain access to the limitless die, a die that you can use to change and manipulate the magic around you. when you are forced to make a physical saving throw(str,dex,con), you can roll your limitless die as a reaction and subtract the number rolled from the save DC. you can also use this feature against attack rolls. 

if you reduce a save DC or attack roll to a 2, 1, or 0, you take necrotic damage equal to the number rolled

your limitless die is a d6 at 1st level, a d8 at level 5, a d10 at level 10, and a d12 at level 13

edge of infinity

you can use your action to pull cores of power from the outskirts of the astral plane, you choose one core type and expend three sorcery points to create and launch it at a target.

repulse: you create a magical repelling force originating from you, stretching to cover a 30 ft cube. all creatures within range must succeed on a constitution saving throw against your spell save DC or take 3d10 force damage and be pushed 10 ft

attract: you create a magical attracting force at a point within 30 ft, all creatures within such range must succeed on a strength saving throw or take 2d12 force damage and be pulled up to 30ft towards the desired spot

destroy: you create a magical ball, throwing it in a straight line to a point within 60ft, destroying all unsecured objects in it's path and dealing 10d6 force damage to all creatures that fail a dexterity saving throw against your spell save DC, or half as much on a failed save

astral void

you can send someone to the edge of the astral plane. your target must succeed on a charisma saving throw or be sent to the astral plane with you for 1d6 rounds or until one of you reaches zero. when you two are in the astral plane, you gain the following benefits

• your attacks have advantage, their attacks have disadvantage
• your attacks count as critical on a 17, 18, 19, or a 20. and you can't critically fail an attack roll
• all saving throws the opposing creature makes are made at disadvantage
• other creatures can't interact with you or the other creature while either of you are in the astral plane

if the creature brings you below half of your hit point maximum, you both return to the material plane. a creature can also travel into the astral plane to get to you through other means(such as putting a bag of holding into a portable hole)

once you use this feature, you can't use it until you finish a long rest.

limitless wellspring

when you use one of your subclass features, you regain one spell slot of no higher than 3rd level and one sorcery point.