Some have guessed the saplings are planted by the Seed Bearers, but in fact, the name ‘Sapling’ is something of a misnomer. These wood spirits are but temporary avatars of the sacred tree, personifications that give Eldiri Nimid agency in the wider world.
Not essential, but extremely efficient. Saplings are cheap and awkward to trade against. They won’t win games, but they’ll never lose them either. Use them for damage, zoning, or plugging gaps in your formation. Play them if you can, but don’t hesitate to discard them for more critical units.
They also interact well with Bloom of Spring, if you’re planning to play it, bringing out a few Saplings to receive the boost can be very efficient.