(6/6/2025) If The Darkness Crystal leaves the battlefield at the same time as one or more nontoken creatures an opponent controls would die, those creature cards will be exiled and you'll gain 2 life for each of them.
And thus, Emerald Charm was a handy solution to any global enchantments (for you younglings, those enchantments which don't enchant anything in particular, such as Form of the Dragon or Worship), a way to bring flyers down to earth, and a second use of a utility creature, all wrapped into one neat little charm
A nice double whammy is reanimating this card for cheap with a stacked hand and then casting Last March of the Ents, drawing you 12 cards and enabling you to put even more free creatures into play
So imagine what a land that taps for a theoretically infinite amount of mana can do
That land becomes a 0/0 Elemental creature with haste