Because this card has no reviews, I thought I would point out something cool about mono-sphere decks here. Each sphere has three cards that specifically benefit mono-sphere decks. Each sphere has a 3 cost event that needs to be purchased by three different heroes (ex. Thicket of Spears), each sphere has a 2 cost event that requires only heroes of the card's sphere (ex. Advance Warning), and most interestingly, each sphere has a card that benefits from a mono-sphere deck. Rather nicely, these final four cards belong to each of the main card types, hero, ally, attachment, and event. I thought I should point this out.