Retreat to Coralhelm is, therefore, a fantastic choice for the deck
I expect Lantern of the Lost to see play across a variety of formats
DailyMTG Story Spotlight Illustrated by Chris Rahn Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
In metagames rife with Reliquary Towers and full grips, this is going to be obscenely good (because it'll be like a 30/30, and it will tutor for that Strip Mine, Dust Bowl, and/or Wasteland to destroy the Towers)
I'm not sure this makes much sense anywhere outside the Mutant Menace precon it came in, since rad counters don't translate to most green decks that care about giant creatures all that well
Since Sothera exiles, it prevents those creatures from triggering death triggers, and lets you take a creature for yourself if a battlefield is ever empty