Here is my rares pool: For my second Sealed, I opened a pool that looked much weaker to me, but in reality I was simply not looking at it in the right way (hindsight, what a blessing!) I started with Blue-White, lost a game, went to Blue-Black splashing White, lost a game, then finally switched to Red-Green splashing White
I saw a Reddit post asking if research in deep learning was slowing down
Land-Based Ramp The most fundamental green ramp cards have effects that put extra lands into play
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Im not sure they quite fit into this category, but cards which by their very nature hurt only one player very badly are worse to have around than Stonehorn Dignitary
(Though Ozai, the Phoenix King does this even better, allowing you to keep the excess mana.) Miirym, Sentinel Wyrm is solid, but only in green-blue-red dragon decks and nowhere else, so that's a tad limiting