yugioh rock stun deck Koa'Ki Meiru Spicy Rock Stun

It is also possible that he ended up at OCG

Not for a long time anyway. Never say never, says Fuji.

Kind of like why regrowth got restricted

Common Link Summon lines included "Aleister the Invoker" "Salamangreat Almiraj" (FIRE) "Secure Gardna" (LIGHT) and later "Aleister the Invoker" "Artemis, the Magistus Moon Maiden" (LIGHT), as the most desired payoff, "Invoked Mechaba", requires a LIGHT monster

What are the differences, and which ones should you get

Pro Tip : While it's completely possible to get rare and expensive cards on Cardsphere, players are likely to continue sending you cards whenever you have funds available