Many Maja decks are green-heavy on account of its access to Rampant Growths and Harrows and the like, but the white landfall spells like Felidar Retreat and Emeria Angel pair well in this deck
If you sacrifice other permanents at the same time, it triggers for them as well
For this article I will primarily focus on Pioneer and competitive Pioneer decks going into the Regional Championships but I will also include some mentions for Modern or Jankier things to do in Pioneer
I dont hate a 4/3 trampling dinosaur, although this is the lowest toughness you get out of a green transformed battle
If Locker Room is worth a third of a card I could see Bottomless Pool being worth it, but I suspect Locker Room will be worth less than that
Alternatively, for four mana, Jace can mill fifteen cards, which is obviously pretty devastating