Underworld Keeper

+1: Search your Libar for either Blackmarket, Offering Shrine or Castle of Unseeked Help. Shuffle your Libary after that.
-4: Take on Token from the Trials Plane. The left Tokens Attack you until the Token you Took is no on the Battlefield anymore.
-10: You Gain a Emblem with, at the beginning of your Turn lay a Trial Gem on your Offering Shrine. You can cast this Twice.