Eisenhorn is an inquisitor, so naturally he investigates, and he turns your library into the Malus Codicium itself to summon Cherubael
I expect this one to see play somewhere
Some blue leaders became important because they offered clean, efficient control tools, while others pushed the game into strange alternate win conditions, draw engines, and value loops that forced Bandai to pay attention
Chimney Imp / Aven Trooper / Viashino Skeleton / Takeno's Cavalry There are a number of small, expensive Limited commons that are both very weak and tend to be tied, often loosely, to a mechanic in the set
Im considering returning Cloudstone Curio to my Animar deck, and if I do, Migratory Greathorn could make an appearance