Update 0.6.4

- Fixed a bug where Rustil became invincible during summoning.
- Increased the drop rate of accessories from bosses.
- Adjusted additional effects based on weapon rarity.
- Adjusted the monster "Seraphyrus": visualized damage-blocking barrier and made it destructible.
- Improved the ability to progress to the next floor after the hero's soul acquisition event in the temporary Story mode.
- Fixed a bug where the "Max Level +1" in the skill tree was not being applied.
- Adjusted the hero's ability "Step avoidance": shortened the timing for re-dodging.
- Fixed a bug where ability descriptions were not displayed.
- Added the hero's ability "Blazing Flash."
- Fixed a bug where the safety mode in regular exploration was not functioning.
- Optimized certain stages.
- Other minor fixes and adjustments.