> I believe there is bug where destiny godly weapons does not spawn when a big daddy spawned on the same floor
I haven't played for some time so bear with me for a bit. When big daddy spawns, does the sound effect and message display? Do the piles of gold pieces also spawn? Do the DESTINY triggers get reset? The relevant bit from the changelog for reference:
[The 7 DESTINY triggers]
* When the sum of experience earned for a group of skills by the player and all pets is above a threshold, +1 letter is gained for its corresponding group.
* The experience earned for a group is tripled when it's that group's day. Experience gained from Traveling is also counted, so these conditions are easily met if you have a lot of pets with high potentials but lots of room to grow. (This should be when the player lacks equipment the most.)
* Clearing at least 1 random Nefia grants +1 letter.
* Sleeping 3 times grants +1 letter.
* All conditions will be met eventually even if the player makes progress at a slow pace, unless it's a solo run and the player doesn't touch significant parts of the game. Which wouldn't be too bad either, since solo runs don't lack equipment as badly as large parties anyway.
* When all 7 letters in DESTINY are displayed in the top left corner and the player character enters a newly-generated random Nefia floor, a sound effect will play, "You felt destiny on this floor...!" will display, 3 Godly pieces of equipment will be placed on the tile with gold pieces in the current floor, and all triggers reset. This will not happen on floors that do not have the gold piece tiles.
* Grabbing these equips and clearing that Nefia while you're at it will cause the corresponding trigger to get activated again, as well as give debris for more skill experience.
>a bug with the blade tubulence special action, when ever the mayu shibayu use that the game crash
There seems to be nothing about that on Ano's blog nor on the wiki's bug report section. Are you playing Elona+ without mods? Is there any error message that displays with the crash? Are you able to see if other NPCs (<Scard> the happy swallow, <Sunrise>, stormbling, <Getuei>, black wing) with that move will also trigger that crash?