Why the cards?
Why just the two Tenyi Adhara how do you use them? They are not used as an syncrho engine like in other decks but for consistency and recursion they can either be used for verte material turn one or most likely and frequently to banish and recur a banished wyrms, but how? well the tokens are non effect monsters use adhara to reclaim monsters of choice from banished perhaps chosen by your grand sword master previously.
Why the Pheonix enforcer? ecclesia recursion from gy and well its just powerful too.
Why so many Iris? Surprisingly comes in useful more often than you might imagine negation hate from yourself and enemy as well lv8 more on that later.
Why the number 100 package? Very easily accessed otk monster in an lvl 8 spam synchro deck also can use harbinger by itself if need more negation.
Why Chaos? Good xyz material discard extender and the extended
Why so strong on the Desires? One of the few decks it can benefit from both the banishes and draws for example Grand Duke, only thing that desires can potentially put an outright end to if unlucky is killing fusion destiny by banishing its targets
The decks primary combos are straight forward
Dragon Sword + any Wyrm/Swordsoul // Dragon sword in hand add Tai A, summon Tai A banish Dragon sword summon token making either yang zing synchro Tai A send Mo Ye, yang zing sacrifice summon Mo Ye reveal swordsoul or wyrm summon token, synchro grand sword master (atm dont get Mo Ye +1) add tactician send sword soul for tactician for ss summon token make any L10 synchro you wish (based on hand may wish to use search for trap/spell or even banish)
Mo Ye + any Wyrm/ Swordsoul summon Mo Ye reveal swordsoul or wyrm summon token, synchro grand sword master cl1 Sword Master cl2 Mo Ye get +1 first just incase you draw a duplicate add tactician send sword soul for tactician for ss summon token make any L10 synchro you wish
As for those like me who aim to make the deck when the cards are availible yes the tech choices are expensive but very very very easily substituted dont need verte only for consistency on pheonix and most hand traps and coounter traps can be swapped for basic floodgates other tech choices and engines a great thing about swordsoul you can play literally any tech choices because its own engine is so consistent and not particularly reliant on anything but desires may be important for boosting consistency through its ratios.