Gaster

After Void Gaster (Or True Gaster/Chroma Gaster). This soul is very overpowered.

Q: Summon Hands
These hands are essential to using other moves.

Level 1: Determination Beam
Uses the red hand to shoot a giant beam. Does 10 DMG.

Level 5: Patience Strings
Shoots a small group of Patience Strings, similar to Patience's Strings of Fate and Status Bind, it traps anyone in it.

Level 10: Integrity Razors
Shoots out 3 razors, deals 7 damage per razor.

Level 15 (Outdated): Bravery Bombs
Summons some white pellets, which explode after a delay.

Level 15: Kindness Shield
Summons a green shield to prevent the user from taking damage.

Level 40 (Originally 50): Polychromatism
Summons 2 large hands used for modified moveset, this can be toggled.

Level 1 PC: Duality Double
Uses a one giant hand to use patience strings, stunning you for a bit, then uses the other giant hand to shoot a red beam.

Level 5 PC: Duality Slam
Both of the hands slam into the ground, deals 20 damage and pushes people away.

Level 10 PC: Last Judgement
Uses the 2 big hands to use Justice's Rain of light, deals 3 damage per hit.