How to get sigils in MWZ?

[Arubika]

I want to get into the dark ether, but dont know how to get these sigils

[Pixel]

Complet all acts + easter egg and after that you can finde them in reward rift

[iitsNatioN]

Kill megabomb, but if you want to enter the dark aether make sure to finish the 4 collectables easter eggs first, means that get the diary in act 4 mission 1 and rest you can find it in regular map.

[IND^k1ndfox]

tier3 red zone contracts drop sigils(for tier4 dark aether), its rng not guaranteed every contract and dark aether contracts drop elder sigils(for tier 5 dark aether where u can get schematics )