Egg-laying noble beasts

On the nature of Portals

Exiles of Mechanus, newfound constructs struggling with the concept of 'identity'

Sigil's omnipresent ruler; Lady of the Mazes, Queen of the Dabus, Don't pray or she'll flay

When the doors shut and chaos ensued...

Sigil's more unreliable means of getting about

Dead Souls who have broken free of their Plane of rest to accomplish a specific goal.