Note that for the starters and their middle evolutions, one version is always C3 or U3 and the other is C4 or U4
With Mikaeus on the battlefield plus a sacrifice outlet like Phyrexian Alter (another worthwhile pick-up for any zombie deck), Mikaeus can infinitely bring back creatures with the Persist ability like Putrid Goblin
The cards dont have to be touching your head, so they can be balanced on top of a hat, for example, but you cant put something on top of them or use adhesives to keep them in place
For cards with physical damage bent corners, edge chips, surface creases, or holo lift
Your final copy of Urabrask's Forge as well as Dragonhawk, Fate's Tempest are great against control decks as well as midrange decks relying on single target removal
Collectors value PSA 10 copies highly due to their rarity and the enduring popularity of Charizard