Myrel easily snowballs by giving you a number of soldiers equal to the amount you already have, which will be stronger on your next turn, and so on
Trostani, Selesnyas Voice Trostani, Selesnya's Voice benefits from creatures with higher toughness, plus it populates with its activated ability
How I wish they could further add more features on this app: like an option to play a certain structure deck versus another structure deck with an AI (or another player for online capabilities) and a DECK BUILDER, allowing you to mix and match cards from other structure decks or booster packs
Same with Selesnya Guildmate or Slimefoot, the Stowaway
Given how strong all of those abilities are, its only natural that thisll see a lot of play, even outside of purely colourless decks
If you sacrifice a creature, (say it's an artifact creature, so use Osgir's ability), it will die, then be exiled (due to Hofri's trigger), this will create a 3/2 Spirit creature token (due to Quintorius' trigger) and a copy of the original creature that is also a Spirit