booster box celestial storm Pokémon TCG: Sun & Moon: Latias and Jirachi Pokémon TCG: Sun & Moon-Celestial

Greninja ( Genetic Apex ) is notably a port of the Greninja card from the TCG's XY expansion, with the same attack and Ability except with rescaled numbers and effects (Mist Slash has its effect removed due to Resistance not being a thing, and Water Shuriken no longer requires a discard due to Energy cards being replaced by the Energy Zone)

Along with the expansion magazine of custom modifications, the efficiency is doubled, making it a very good ammunition supplement card

Then E'rah appeared

In an actual TCG event, you should ask your head judge on how they will rule it before your event to understand how how it will work for that event

This concept has been the backbone of a ton of aggro strategies for years