Not sure how I feel about sacrificing nonbasics, especially in Discovery's colors. We do have a few other red cards that sac lands though.

Thinking about it, this might actually be too powerful, as you could conceivably use it to clear the board for your opponent simply by sacing a bunch of nonbasics.

That's why it is in Discovery Red, so you can use your nonbasics you hopefully accumulated when you want to use it.

Yeah, it borders rare, think playtesting is going to reveal if this is too strong or not. Could very well be a dead card all game long though.