If Fecund Greenshell's second ability stops applying (because Fecund Greenshell leaves the battlefield or loses its abilities or because you no longer control ten or more lands), then any creatures that needed the toughness bonus to stay alive will die
Choose a Background (You can have a Background as a second commander.) Legendary Creature - Rogue Halfling Color tag templates(None) Blackbloom Rogue Menace (This creature can't be blocked except by two or more creatures.) This creature gets +3/+0 as long as an opponent has eight or more cards in their graveyard
Other Budget Upgrades To Consider Vraan, Executioner Thane is generally just a better Blood Artist and would be a strict upgrade
But with only 15 Transformers cards in total, to leave at least half of them out of any themed Commander deck seems like a net negative, particularly when the missing cards break up the most natural mechanical and flavor pairings, like using Blaster to enable Arcee and Jetfire
It's also a flexible deck with several ways to win
Elementals have always had powerful individual cards, but previous Elemental Commanders like Omnath, Locus of the Roil were limited by color restrictions
