Any "as [this creature] enters the battlefield" or "[this creature] enters the battlefield with" abilities of the creature will also work
This doesn't make them actual creatures or anything, but it does allow them to benefit from some typal effects
Gone are the days when people needed to debate whether the Urza lands or Strip Mine can be considered common cards because they were printed in special sheets with common rarity
1 Elesh Norn, Mother Of Machines - $164.48 The central figure of both the set and the Phyrexian storyline, Elesh Norn, Mother of Machines imposes its effect on the battlefield ruthlessly the card is most expensive when it's a Borderless Step-and-Compleat Foil, but challenges every other card on this list in price with its many variants
Lastly, Mew can be obtained from the Mythical Island booster pack
First up, a fresh-faced planeswalker Kaito Shizuki