Causing your opponents to sacrifice three creatures, or lands, or enchantments, or whatever
Players get a chance to respond without holding up the game, and everyone's time is respected
Currently, the most popular xyz monsters are the ones that "go around" the xyz summon mechanic, as they are more generic
This ensures a consistent flow of powerful Pokmon into the Active Spot, maintaining offensive pressure
Getting free value for creatures entering and that includes through token production, flicker, or any other means, not just casting is a recipe for success
End Step (NSFL) If youre a fellow Redditor and looking to see some of the most destroyed cards that Magic has to offer, I recommend indulging in MTGgore