Even though it might seem powerful, you can only do it once per card, since The Eighth Doctor makes it so those cards get exiled if they would leave the battlefield again
For raw cards being sent for grading, they should be in a semi-rigid sleeve, sandwiched between cardboard, and secured with bubble wrap to prevent any movement
Exceptional though these cards are, they are only the tip of the iceberg
Sets #1, #2, and #4 are standard expansion packs (30 packs 5 cards)
First, Chapter I lets you choose the most threatening noncreature artifact from each player to turn into a 0/4 Wall artifact creature with defender in the hopes that, once Chapter III comes around, you will destroy all of them (along with any other Walls around)
Can these holders be reused over time