If you dont remember what was said there, I highly recommend reviewing it, but the super short version is that you count your mana symbols, figure out their ratio, and then apply that ratio to the number of lands you plan to play
It can be useful for breaking boards when you have nothing in play yourself
Knight/Empress Judge (with "Instant Fusion"/"Ready Fusion") Predaplant Dragostapelia Level 5 to 6 "Elemental HERO" monsters (with "Instant Contact") Ferocious Flame Swordsman Isolde, Two Tales of the Noble Knights (OCG or Traditional Format only)
Best cards : Luffy (Leader), Sanji, Thousand Sunny
Master Duel , or virtually any other digital card game in the modern era, Pokmon TCG Live isn't designed with in-game microtransactions in mind