kaiju deck yugioh master duel (June 2024) by GeneralPhoenix Kaiju Deck Breakdown | Guides,

Blister Packs Holographic cards have slightly more weight than the other cards, so many people open booster boxes and weight the booster packs inside using a jewelers scale

Check for printing errors on the card back As the one part of a Pokmon card's design that almost never changes, you might think that the iconic 'Pokball on blue swirl' card back design would be the easiest thing to fake correctly, but in fact it's specifically designed to be difficult to reproduce just right, and consequently is an important red flag for fakes that you should always check

Mechtitan Core Mechtitan Core barely counts because its not exactly a titan per se, but none of the cards on this list are really a titan either so that means I make the rules here

The trigger to transform back was a little harder