rare cards vivid voltage Rayquaza Sword & Shield—Vivid Voltage Booster

Because those cards could target ther Flash either in play, while being cast, or in hand, you could use any of them to remove it from that stack

Its a decent 5/5 Flying Vehicle, but most importantly you get an additional Beginning Phase if it can deal combat damage

There are a bunch of cards to look out for outside the top ten, with other cards including: Ivysaur (167/165) valued at $25+ Wartortle (171/165) valued at 25+ Dragonair (181/165) valued at $24+ Pikachu (173/165) valued at $24+ Blastoise ex (184/165) valued at $17+ Erikas Invitation (203/165) valued at $17+ Prices are constantly changing, and the prices currently on showcase here are from Nov

If you had a way to make copies of Combat Celebrant, however, like Rionya, Fire Dancer if you want to keep the Human theme, or even a Helm of the Host, you can exert the copies you make each combat step to get infinite combat steps