Psychic Savant

You hone your psionic talents to make your psychic attacks more effective. Psychic energy is a spark that you feel in your very body and soul, which results in you gaining access to the mind sliver cantrip, if you did not already. The ability modifier for this cantrip will be your choice of Intelligence, Wisdom, or Charisma. Once you choose the ability modifier, this cantrip will always use this ability modifier. 

Spells or weapon attacks you cast ignore resistance to psychic damage. In addition, when you roll damage for a spell or attack that deals psychic damage, you can treat any 1 on a damage die as a 2.

Empowered Psionics. Every psychic attack is a spark of psionic energy you fan with your innate talent. Whenever you successfully deal psychic damage from a spell or weapon attack, you deal an additional damage die of psychic damage to the target of the psychic damaging cantrip, spell, or weapon attack.

Psionic Detonation. Sometimes, when you fan the flames, a spark can give way to an explosion. Whenever you successfully deal psychic damage from a cantrip, a spell or a weapon attack, you may choose to roll a 1d20, and if you roll higher than or equal to a 10, you deal an additional extra damage die of psychic damage to the target of the psychic damaging spell or attack (this dice is in addition to the Empowered Psionics feature). If you roll lower than a 10, nothing happens. On a critical success, you deal an extra damage dice of psychic damage to the target of the psychic damaging spell or attack and also detonate a blast of psychic damage that damages all enemies within 10 feet surrounding the target for 2d10 psychic damage. This damage increases to 3d10 at level 11, and 4d10 at level 17. On a critical failure, you take a damage dice of the spell or attack of psychic damage. You may use this Psionic Detonation feature an amount of times per long rest equal to your proficiency bonus.