Over 400 cards (not including tokens)
If you want to run fetches of any kind, Walk-In Closet would probably be worth including, I just didnt in my list
Last, it helps you with the mana needed to take advantage of the top of your library instead of just being a value play, as many other cards well address are
A strong sense of depth makes the card stand out, and the focus of the image around the center prevents the background figure of Merlin from fading into the distance
Six mana can be a lot, but red has no shortage of rituals or Treasure tokens to get this out early, and while you cant cascade from copies of spells, you can discover if you cast cards like Trumpeting Carnosaur or Hit the Mother Lode, which then gives you more copies