Most effects that reward you for being the monarch trigger in your upkeep, which requires you to keep the crown for a turn
K9- Lupis X EARTH Level 5 [ Beast-Warrior / Effect ] ATK 2300 DEF 200 An Xyz Monster that has this card as material gains this effect
Deck Concept The concept is based on a Dinosaur x Thunder Dragon x Shadow Doll deck, which is already highly compatible and strong even with just two types, but by mixing all three, it becomes a deck with immense stability and power
Enemy-color multicolor cards would eventually get made, but always in a quantity lower than ally colors and at a lower power level (enemy-color cards were often weaker than ally-color cards)
This 15-pound mammoth case can fit over 250 slabbed cards, and one can only guess how many double sleeved cards or deck boxes that translates to (hint: a lot)
A cursory look at Amazon shows a variety of Starter Decks, punching anywhere from around $15 on the low end to over $50, so theres some instability in prices