Use Leftovers and Lillie to keep your Pokemon alive, and if you come across a Pom-Pom Oricorio, then turn to Magearna to counter it
Entering the battlefield with two additional bodies is slight overkill for Celebration triggers, so this card is most efficient for Rat sacrifice builds and might get bulked up into a semi-evasive finisher, something every "aristocrat" deck needs
When any "Spirit Message" card or "Destiny Board" you control leaves the field, send all "Spirit Message" cards and "Destiny Board" you control to the Graveyard
You can only use each effect of "Galactic Spiral Dragon" once per turn
On the flipside, using this card to strip hands in the developing stages of the game is much more problematic, and can cause the kind of stalemates and draw-pass gameplay that can lead to players checking out emotionally, if not literally
Mana Confluence and Sliver Hive are a good start, especially alongside Manaweft Sliver