I wont be suggesting creatures that are legendary, but other card types are completely valid
While the essence of the game has always stayed the same, the rules of Magic have undergone three major revisions with the release of the Revised Edition in 1994, Classic Edition in 1999, and Magic 2010 in July 2009

They look as follows (the dagger marks signifying the fact that it is impossible to tell the beginning and end of the sequences): Nidoran m, Diglett, Abra, Fire Energy, Starmie, Ponyta, Fighting Energy, Koffing, Pikachu, Doduo, Fire Energy, Gust of Wind, Machop, Lightning Energy, Gastly, Ponyta, Tangela, Grass Energy, Squirtle, Voltorb, Psychic Energy, Sandshrew, Weedle, Rattata, Water Energy, Drowzee, Poliwag, Fighting Energy, Charmander, Potion, Onix, Lightning Energy, Koffing, Magnemite, Psychic Energy, Pidgey, Abra, Metapod, Water Energy, Diglett, Staryu, Fighting Energy, Caterpie, Switch, Vulpix, Fire Energy, Voltorb, Machop, Grass Energy, Poliwag, Nidoran m, Rattata, Lightning Energy, Gastly, Doduo, Psychic Energy, Tangela, Sandshrew, Bill, Fighting Energy, Vulpix, Squirtle, Fire Energy, Pikachu, Bulbasaur, Drowzee, Grass Energy, Onix, Pidgey, Lightning Energy, Staryu, Charmander, Metapod, Psychic Energy, Energy Removal, Magnemite, Water Energy Poliwhirl, Maintenance, Farfetchd, Ivysaur, Pokmon Center, Machoke, Jynx, Full Heal, Kakuna, Double Colorless Energy, Porygon, Charmeleon, Maintenance, Poliwhirl, Raticate, Pokdex, Nidorino, Magikarp, Professor Oak, Magmar, Pokmon Flute, Porygon, Haunter, Energy Retrieval, Seel, Dratini, Double Colorless Energy, Growlithe, Wartortle, Full Heal, Dewgong, Defender, Kakuna, Magmar, Pokmon Center, Raticate, Seel, Revive, Nidorino, Kadabra, PlusPower, Dewgong, Super Potion, Arcanine The length of the sequences (77 and 44) which add up to 121 cards are too much of a coincidence to assume anything other than that they were printed on one single sheet and then separated before being inserted into packs

It is essentially a Birds with haste and draw a card once you get going
The slow drain from the ETB adds up, especially if youre producing tokens with cards like Bitterblossom
Uncommons are often more complex than common cards