most expensive pokemon cards obsidian flames Valuable Pokémon in Flames! Best Cards to Pull at PreRelease! (Pokémon TCG News) 10 Most Valuable Obsidian Flames

Check for holographic and reverse holo features Holographic (holo) cards display a shiny effect on the Pokmon artwork only, while reverse holos apply the shimmering effect to everything except the artwork

Her lifelink does work for the sweeping effect, so you'll gain loads of life

What makes these so strong is that they are effectively a land

It's currently being selled by the minimum price of $ 0.79

For example, you could cast a sorcery with flashback as though it had flash

Read more If you want to read up on the topic as a introduction, you can read this (older) but interesting article by wizards them self can be found here