The PSA is considered the standard for grading Pokmon cards, so its the most commonly used service
Sometimes, NPCs or Auto-Duel AI will summon spam 3 monsters on the field, activate the monster's effect to boost its ATK...and then immediately use them as material to summon an ace card that ends up having less ATK than the total ATK of its materials
You can activate Deck Lockdown to prevent both players from adding cards from their deck to their hands, apart from the draw phase, and prevent your opponent from special summoning from their deck
Considering how many effects create these tokens, and how many noncreature spells you can run in this format where half your creature slots are actually equipment, those triggers can end up doing more than half your damage in a lot of games
1 Bicular: When its destroyed as a result of battle, it can summon its one-wheeled friend, Unicycular
So with our pool established, which legends ended up making the cut