It functions almost like a legendary sorcery in that you need to control a legendary creature, but with the Ring tempt at the start of the effect and Commander's color identity, this is essentially a Grim Tutor with upside rather than life loss
And now, you'll have Swarm in your hands to battle it out on a tabletop
Cards or abilities that end the turn on the spot, like Time Stop or Glorious End, dont skip the cleanup step
Pair it with Scroll Rack to turn your lands into card draw
#5 Green Suns Zenith Green Sun Zenith is a one mana Rampant Growth when it grabs Dryad Arbor
While it can still deal damage the same way its purely Goblin counterpart can, it can also ramp out even bigger Eldrazi thanks to the tokens it produces, 0/1 Eldrazi Spawn that can be sacrificed to produce a colorless mana