I figured it out! it's all Tewi!
beware though, this
ultimate fool proof theory is quite heavy on spoiler
tagYou see where i'm going? Tewi use the power of Bamboo Forest of the Lost!
With some tweak, she make an individual "lost sight" of where their "being" was supposed to be.
The "lost individual" then unconsciously attempt to find a way to go back into their "being", the "gate".
The tweaked power of Bamboo Forest of the Lost, again, messess with the "lost individual", leading them to the wrong "gate", the "gate" that are belong to another "lost individual".
And by doing the same thing to another individual, the two "lost individual" swapped "being".........
Of course it's not Tewi power alone, she use an urban legend from outside world, a power, an urban legend, that Tewi received from her secret long time acquaintance who had collected them on hidden agenda,
, and THAT urban legend IS
, which at it's core is the Law of Idle and Balance.
Out of that, Tewi make concept of Equal Exchange, or something like that, a concept which is acceptable to the Law of Idle & Balance. Channelling that concept to the basic principle of Bamboo Forest of the Lost, resulting
Equality of Exchange "Between the Lost Being".......
(im not savvy at these reference based Spellcard Name, so it came out dull, sorry)Tewi got herself an "getting in the nerve of everyone" inaba. almost. ultimate. troll. tool. MkII..........
And of course this is all just Tewi
Perfect Possession is merely a code for