Man-o'-War (Mirage/Visions/Weatherlight) Undo and Man-o'-War were often seen together in packs, and players debated which was better: the sorcery which took out two creatures, or the 2/2 creature which took out one
The Dark was slow to gain popularity with collectors and players as the set does not contain a lot of powerful cards in terms of game play, though Ball Lightning, Blood Moon, Maze of Ith and Sorrow's Pain are notable cards
Crafting this is easy though, and the recursive ability gives you an expensive loop for grinding through the lategame
If Transmute Artifact is countered, you do not have to sacrifice an artifact
This is one of those underrated life counting tools that is both a great talking point at the local game store, and a simple way to track poison counters, energy and commander damage
Cards on the Reserved List (never to be reprinted) or emerging must-haves from new sets can also fetch a good price