Ulamog, the Ceaseless Hunger 7 New Ulamog is a fair bit better than the old in these kinds of application
(Megamorph, the alternate-reality version, was not as much a hit.) I really like how manifest shows that you can take a core good design idea and extrapolate it to make something related, but different, that's equally fun
Your engine piece will eat a disenchant
Cards that trade something of yours for something of theirs arent exactly what were talking about, which includes cards as simple as Gilded Drake or as complex as the ultimate on Aminatou, the Fateshifter or even Scrambleverse, but well address those at the end
The decks have less than a $10 difference otherwise, which is negligible
Alliances was a pretty revolutionary set, and Thawing Glaciers was an important part of that revolution