Its attack depends on discarding energy, which is usually a downer, but in this case it can be from any Pokmon you have in play, and its unlimited
Im curious to see whether Planisphere can actually take the place of Cori-Steel Cutter in that type of deck, or if it simply ends up competing for that key two-drop artifact slot
Any creature the player controls that couldn't be targeted by the original spell (due to shroud, protection abilities, targeting restrictions, or any other reason) is just ignored by Mirrorwing Dragon's ability
A big draw for many players is going to be the Pro Tour Minneapolis event with $500,000 in prizes available to players
Each regulation mark is a single letter
This could potentially prevent new players from being able to acquire and enjoy these decks as intended