pokemon mew card promo English EX SVP053 - 151 UPC Weakness / Resistance / Retreat Cost Pokémon 151 Mew & Mewtwo

During or between tournaments players would battle with Pokemon/WOTC reps and receive different promo card rewards

With a high density of even-cost Clones, including Spark Double, as long as you didnt whiff, you could keep selecting Clones with Gyrudas triggered ability, copying Gyruda, and eventually win the game by either Milling your opponent out or presenting an insurmountable board presence

Moreover, on ETB she creates a 1/1 white Ally creature token which is a nice bonus

A near-perfect Beta copy is a prize for any serious collector or player

Avacyn pairs very well with board wipes , which turn one-sided since your permanents will have indestructible

EDIT: A few people have asked about this Blue Skies list and I asked my opponent, Alfredo, if he would share and he obliged