Kaio-Ken

Kaio-Ken is a feat learned by undergoing intense training with King Kai on his planet(you can visit during meditation by visiting the astral plane). but its not a 24\7 feat and needs to be activated, but after use needs to be recharged per long rest.

 * To activate you spend 1 Ki point to activate 

* When you activate Kaio-Ken you gain a bonus +5 to all attacks, Gain +10 movement speed.  Gain proficiency with perception, insight, and dexterity checks\saving throw.

* Gain a dark red aura (Grows larger and brighter the level of Kaio-Ken you use)

* but at a drawback, after your turn while activated you take 1d6 damage

* there are four stages of this feat, Kaio-Ken x4 (When you get the feat), Kaio-Ken x10 (Level 10), Kaio-Ken x20 (Level 15), then Kaio-Ken x100 (Level 20).  When you use a higher level of Kaio-Ken then x4 your damage bonus gains a +5 per level, and speed gains a +10 per level during this state.  But you roll double the damage die per level meaning, x10 is a 2d6, x20 is a 4d6, and x100 is a 8d6