pokemon sword and shield silver tempest rare cards Trading Card Game & Secret Serperior VSTAR #196 [Secret] Listed cards may have imperfections. Pokemon Sword & Shield Silver

A local friend in Chicago has been known to do this with his Stasis deck, and bring in not only Serra, but also Savannah Lions and Serendib Efreet, morphing in to a Blue-White tempo deck

Presumably, the answer wont come until a later Lorcana expansion, but until then, there are plenty of clues scattered throughout the cards for collectors to piece things together themselves

It is functionally identical to Rare Hunters format

Fusion Strike has 284 cards in total (264 main set cards plus 20 Secret Rares)

Synchro Summoning depends on swarming the playing field with lower level Monsters like Speed Warrior and Junk Synchron, letting you easily Synchro Summon a more powerful Monster to the field

Its not even conditional, so you dont need to build around it