Whenever one or more artifact creatures you control attack, Iron Spider deals X damage to any target and you scry X, where X is the number of tapped artifacts you control
These are Marvel Comics were talking about, so there were tough decisions to be made about which bits could most easily fit the mechanics of Magic: The Gathering
It's more of a classic than Mind's Eye because you can kill tokens or X/1 dorks to draw, trigger death triggers like Blood Artist and draw all day long
Other good ones could be the Cave of the Frost Dragon, providing an elusive threat in the late game and Den of the Bugbear, capable of putting an extra attacker each time it swings
Even if these mythics are the pinnacle of what we can expect in Double Masters , that sets expectations extremely high for the remaining cards
This list includes several Fogs because theyre efficient means of preventing all combat damage, but we also have cards that grant protection, which prevents damage from specific sources, and cards that grant indestructible to your creatures, which doesnt prevent the damage but makes it irrelevant