Once you have accumulated a wide board, you can then use an overrun effect to swing out for lethal damage
Often that is with creatures that rise from the graveyard, however flashback allows spells to come back for a second time
A pair of Munkidoris is the obvious choice, but you can also use Yveltal's attack, plus Pecharaunt ex's poison alongside a monkey
Fully Blooming Energy works only once you Evolve into Vileplume, and you can search the top 8 cards of your deck for any number of basic Energy and attach them to your Pokemon in any way you like
With so little time between releases, players are having trouble keeping track of everything thats going on
Id play Sevinne without the second ability, so Ill definitely play it with it