Its a three-for-one however you cast it, which is really important to keep up with multiple opponents in Commander
Speaking of mana, Soporific Springs can be an untapped blue land, and those are well worth 3 life, just ask your opponents how much they like holding that zombie combo piece in their hand
Most Commander decks won't touch these cards, but they'll work splendidly with cards on this list
Catch-up cards usually follow a blueprint of: If someone else is ahead on X, I get Y. Sometimes X and Y are the same thing, and sometimes you get a completely different resource altogether
Because when players ask whether there are crystals in Magic: The Gathering's Final Fantasy crossover, they are also speaking of the darkness crystals, which have been linked to much more sinister forces