froslass pokemon card PSA 10] Mega ex 224/193 prizer its Ability can ramp itself to 90 damage in one turn Froslass (Secret) - SWSH07: Evolving

This is primarily useful in black decks that focus on sacrificing their creatures, but it can still get some mileage from black decks that use other tactics

It doesnt wreck snow decks, but it is annoying enough to have an effect

It can win games, so you might very well want to spend the extra cash on additional copies so you can pull some wins

White has a handful of decent ramping options as well, such as Kor Cartographer, Boreas Charger, and Knight of the White Orchid - each of which will help find you more Plains in a pinch

[2] Each Pokmon card has a weakness or resistance that affects how much damage is dealt, such as Charmander, who takes more damage from Water Pokmon