sv8a booster box Pokémon Terastal Festival Ex dropping ex cards thatll make your collection sparkle Terastal Festival Ex Booster Pack

If its a sanctioned FNM event, the proxy rules dont change just because the format is Commander

They may have been collaboration cards like the Potato Chips and Monster Strike promos, where rights issues prevented it

The summoned character gains Rush - allowing them to attack on the same turn - and must be banished at the end of the turn, making the effect perfect for throwing attacks at your rivals without worrying whether your card survives

Jirachi can be obtained from Mega Rising: Mega Altaria pack in the Mega Rising set

This was very therapeutic to watch, says @nickfranco865 in one of the comments

Incapsula incident ID: 1080000280131217290-246767599465531152