Corrupted Grafstone: What Can It Do?

is an interesting mana rock. It can make many different colors, but only costs 2 instead of the usual 3! To make up for that, it comes in tapped the turn you play it, and it requires a little work to get going. It has a normal mana ability (because it isn't a loyalty ability and doesn't target, and could add mana to a mana pool as it resolves!), so it doesn't use the stack, resolves instantly, and can't be responded to. But, it requires you to choose a color present among cards in your graveyard,

Read more.