This is a bad card. Even in EDH. A lot of people tout this as a staple, or at least a powerful card, but at this point, I'm not convinced. Let's compare it to a "similar" card draw spell. Now, scrying isn't the same as drawing cards. It is often considered to be worth about half a card, but let's be generous toward arena, and say that scry 1 is worth one quarter of draw 1. This puts read the bones at about 2.5 cards, creating a net of 1.5. That will be the baseline by which w