Your opponents never know if your Islands represent Counterspell, Fact or Fiction, or Hullbreaker Horror
Rites of Flourishing and Song of Creation both let you play more lands a turn, Growth Spiral, Explore, Tail the Suspect, draw cards and put extra lands in play, and cards that care about lands entering such as Tireless Tracker, Tatyova, Benthic Druid, Phylath, World Sculptor, and more
If this card attacks an opponent's monster, as long as you control no Spell/Trap Cards, your opponent cannot activate any Spell/Trap Cards until the end of the Damage Step
This forces them to spend resources on your card to avoid being overwhelmed
Nimbus Maze also saw its first printing here
Esper Midrange Esper Midrange is not far behind Dimir Midrange in popularity