Lumra enables infinite loops with lands like Sanctum of Eternity or Mirrorpool that take advantage of its land recursion ability and a land untapper like Spelunking or Amulet of Vigor
I dont think Id normally be in for Breakneck Rider, particularly with this many other three-drops, except that Collected Company strongly encourages us to play more threes than normal
In case you're in doubt, and dont know which cards you should send to the Lost Zone, consider sending these first
Plus, if it dies, you get to make a lot of Treasure, even helping you cast the next one at a larger size
For instance, even though Tyvar Kell is a fantastic and powerful card, youre only going to play it in Golgari elf tribal
Myr also have great potential for creating combo engines, as many of them interact well with artifact-based effects and recursion