yugioh invincible fortress deck RESTORING the Lost Structure - ROMHACK but it also includes a beginners guide to help you master the art of dueling Structure Deck: Invincible Fortress -

Daybound (If a player casts no spells during their own turn, it becomes night next turn.) [+1]: Until your next turn, you may cast creature spells as though they had flash, and each creature you control enters the battlefield with an additional +1/+1 counter on it

An obvious reason for this is that a screen split between four battlefields would get too small for you to see everything in a clear and structured manner

There are also some Rental Decks that don't highlight a Pokemon but instead highlight the Gym leader Trainer cards, like Brock and Blaine

Basic lands dont count for this and can be as abundant as you desire, but unique lands like Breeding Pool also have a 4-copy limit