Season's Legacy

Season's Legacy is an event that launches after the Seasonal Kingdom ends. It runs on all kingdoms — you can take part even if you didn't play in the Seasonal Kingdom, but you need Guardsmen level 5 or higher to join.
If you reach level 5 after the event has already started, you can still join at that point — you're not locked out for unlocking the level late.
Why are my personal goals harder than another player's?
In Season's Legacy, your personal goals are set by your division, and your division isn't based on your Guardsmen level alone. It also takes into account your overall Guardsmen technology progress — strength, health, and the other technologies you research between levels.
This is why two players on the same guardsmen level can have different goal difficulty: the one who has researched more of the in-between technologies may be placed in a higher division. For high-level (level 9) players, your unlocked specialists and monsters are also taken into account.
Why is this event so difficult?
Season's Legacy is designed as a high-difficulty event built around 30 days of gameplay, so the personal-goal requirements are higher than in a regular tournament.
It also contains valuable rewards that can only be earned in the Seasonal Kingdom from guardsmen level 6 onward — the elevated requirements reflect the value of those rewards.
How do the Mythic Reward Chest rewards work?
To receive a Mythic Reward Chest in Season's Legacy, you must have already unlocked at least one Mythic Reward before on that same progress.
Mythic rewards are tracked per progress (your main progress and your seasonal progress are counted separately).
Example: If your seasonal progress earned a chest from unlocking G6 and you used it to unlock Skadi, then that same progress is eligible to receive a Mythic Reward Chest again in Season's Legacy — and you'll be able to choose from the other rewards (Beowulf, Heimdall, etc.).