Eidolons
These bizarre¸ other-dimensional creatures present themselves as aspects of mortal concepts - meanwhile twisting reality into shapes that have nothing to do with mortal concepts. This comprehensive 13th Age Bestiary-style monster writeup is a gift to GMs who don't mind shaking the tree until walruses and new philosophies fall out.
Eidolons is the fifth installment of the 13th Age Monthly subscription. When you subscribe to 13th Age Monthly¸ you will get all issues of the subscription to date.