Decree of Justice helped to make Mono-White Control a winner when it was printed, which I played heavily and even wrote a primer on it here ( You can wait until EOT, tap out and cycle for a ton of 1/1 and then you drew a card and it was hard to answer since you cannot counter a cycle since it wasn't cast
Sadly, because it is five mana and slow to get going, although it is still a great threat, it is not a great life gain card
I have played since the first Swamp art in Alpha/Beta were available in booster packs, prior to the first slate of alternate basic land art in Ice Age
I'm guessing the latter will be more common
1 Rare or Mythic Rare card
Especially in older Eternal formats like Modern and Legacy where you can quickly fill up the graveyard with fetch lands and other spells like Thought Scour to draw three extra cards as early as turn 2