You can find the most recent lists from the latest tournaments in the Tournament Archive
Red-Eyes Black Dragon needs some punctuation in the last sentence, but it might be a little too good, as a repeatable one-sided boardwipe, discard, and draw engine
Ashaya, Soul of the Wild can help you secure that second landfall trigger as it makes nontoken creatures into Forest lands in addition to their other types

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But after reading the comments in this thread, the card seems to be worth the money (for the right buyer, that is)
Koth Discard a land card: Koth deals 2 damage to target creature or player