yugioh magnificent mavens booster box Yu-Gi-Oh! TCG: Display (2022 Holiday Bo – Shopville %20Soldier%20of%20Chaos%2C%20Swordsoul%20of%20Mo%20Ye%2C%20Traptrix%20Sera%2C%20and%20Blue Yu-Gi-Oh! TCG - Holiday Box:

They add keywords like trample, first strike, or flying to a creatures card text so long as the counter is on the card

Equip Artifact - Equipment Syr Konrad, the Grim Whenever another creature dies, or a creature card is put into a graveyard from anywhere other than the battlefield, or a creature card leaves your graveyard, Syr Konrad deals 1 damage to each opponent

These errors are easy to spot even to new collectors such as square cut corners versus the correct die cut (rounded) corners or OC (off center)/ miscut cards where the card clearly did not line up properly when cut from a large sheet of cards into single cards resulting in significantly off-center cutting of the card or in some cases, cards comprised of two halves of different cards

Cards with printing errors like holographic bleed, original WOTC-era sets, and Japanese promos tend to command the highest premiums

Lastly it can point out signs of altering on a card