It seems like you've discovered a lot of different ways to obtain different ninjas in the game! It can definitely get confusing with so many options and changes over time.

To summarize, here are some of the ways you can obtain ninjas in the game:

1. Season System: Certain ninjas are only available during specific seasons, but may become available through other methods later on.
2. Monthly/Daily Sign-In: Some ninjas may become available as rewards for logging in daily or monthly.
3. Mission Gift Box Pack: Certain ninjas can be obtained through mission rewards.
4. Sage Treasure Event: Some ninjas may only be available through special events like the Sage Treasure event.
5. Survival/random: Some ninjas may be available as rewards for completing Survival missions or randomly.
6. Special Events: Certain ninjas may appear as rewards during special events like the Fireworks event.
7. P2W-ingots Ninja: These ninjas may only be koows available through purchasing with real money, and may become available through other methods in the future.

It's important to note that the availability of certain ninjas may change over time, and some may only be available for a limited time.