This is all due to the careful balancing the games creators do to ensure that things stay relatively fair within these sealed games
It can be confusing at times
Printed mostly in Legends and Mirage , with sprinklings in Visions , Homelands , and Alliances , Enchant worlds were enchantments with a rule-setting flavor with a special rule that only one could be in play at a time
part of the fun of playing paper MTG is that we can use all sorts of cool trinkets to represent them, from dice to sleeves to pretty much anything you can think of that happens to fit onto a playmat in large numbers
Storm Storm has been around since Moderns inception
This is a little counterintuitive since planeswalkers are supposed to represent specific characters that dont have different identities on different planes, but you can 100% own three copies of a Jace, Liliana, Teferi, etc