At any time when you would draw a card (including with a card effect) you can pay a certain amount of DP to instead draw an exact, specific card, or you can pay a somewhat smaller amount of DP to randomly draw 1 card from a predetermined smaller pool of cards, usually 3-5 cards
Use Brilliant Fusion to Summon it, otherwise don't even bother Summoning it 1x Gem-Knight Lady Brilliant Diamond: Send 1 Gem-Knight from field to GY, Summon Master Diamond from EX
After all, there is a reason why Mirror force is probably the most used Trap Card in the series
(No way I can jump all the way over to that side) " " Mmm
We can even maximize the Food production with cards like Meria, Scholar of Antiquity
Here is the process from printing the design to laminating them, cutting them out, and putting them in slabs