Soul Cut:: Allows 自分 to harm 相手 even in a dream
Ego Sword:: A sword literally made of 自分's Ego self
Understanding:: Allows 自分 to counter 相手 effectively
相手:: Has extreme vertigo in the dream realm
Untethered:: 自分's untethered to spacetime in dreams
To survive within the dream realm, 自分 strengthened his identity so he may not lose it.
Unlike normal humans, 自分 balances & understands spacetime not from innate understanding from human instinct, but transcendent knowledge, allowing him to move normally even in the dream realm.
[Dream Dive]: 相手's sent to the dream realm, where 自分 has the advantage, cutting apart the now very confused 相手.