Rivendel Plane: Middle Earth Green creatures get +1/+1 and have Forestwalk
Lifegain in Magic is generally bad (unless its incidental on an already-playable card or a dedicated anti-burn card), whereas its common in many LoR decks
Unfortunately, unlike artifacts, enchantments, and even ramp, there simply aren't that many "the top of your deck matters" cards in Magic , so there's only so far you can take the theme
further, they contained all the printed information needed to understand them (according to the standards of the day) in a more compact form than the then-standard
Meanwhile, the Secret Lair Reaper King is going for $9, while its original Shadowmoor non-foil printing is $11 and its original foil is $66
Calix, Guided by Fate - Making your creatures bigger when you drop enchantments is pretty huge