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Once per turn, if another face-up "PSY-Frame" card you control leaves the field (except during the Damage Step): You can Special Summon 1 "PSY-Frame" monster from your hand

What do Magic card rarities mean

Scion of the Ur-Dragon was one such early legend, with others like Marina Vendrell, Tom Bombadil and Go-Shintai of Lifes Origin being more contemporary and restrictive ones

The One who encompasses all

You can then use his second effect to take control of an opponents monster, provided you have a monster in your hand with the same level

It was originally the number one on my list because of how annoying everyone finds it to play or watch someone else play, but the final one is actually truly annoying