The rare tiers
Duo and Legendary boons sit above normal boons. They need two gods already on your build before they can show up.
Normal boons are the bread and butter. The rare tiers are the payoff for committing to a god pair early.
Triggering a Duo
A Duo boon needs boons from two gods that the game links. Hold both and the special option appears in a reward.
Plan your opening keepsake and boons around one pair. Chasing a Duo without the setup wastes the whole attempt.
Are Legendaries worth it
A Legendary boon grants a unique effect no normal boon matches. It is strong, but it locks your build to its gods.
Take one when your run already leans that way. Forcing it early tends to break a better plan. The boon priorities page shows the base plan.
Next: Hammer upgrade priorities.