Sandwurm Convergence
Two effects that have no business sharing a card, stapled together at eight mana because green's reward for surviving to the late game is to stop pretending it has weaknesses. The first half closes off the one attack vector green players have always paid for: flying. Ground creatures green can simply outsize, but a card that shuts down the air for free turns the whole anti-air problem into a non-issue, no fliers of your own required. The second half does what green's expensive enchantments do best, manufacturing a board out of nothing on a recurring clock. The 5/5 that shows up on your end step is the part that actually ends games; the flying lock is the part that ensures you live long enough for it to matter. The cost is the honest tax here: at eight, this is a payoff for a deck that has already won the resource war and wants a single card that both seals the back door and supplies the offense. There is no early-game version of this. It commits to being the thing you ramp toward, the card that says the durdle is over and the wurms are coming. As a top-end design it is unusually self-sufficient, which is also what keeps it out of leaner decks: anything that wants a green finisher this late wants it doing more than one job, and this one happens to do two.
