With the Fully Charged ability youll pay one ink less to play it so long as you have an Inventor character out
Oran-Rief, the Vastwood Oran-Rief, the Vastwood is a strong land for creature-heavy builds, especially if your deck is focused on tokens or +1/+1 counters
Then include three or four other Supporters for added utility, like the excellent Boss' Orders card that will force your opponent to replace their active Pokemon with one of your choice
It might be expensive on paper, but I think this green sorcery plays a lot better than it looks
This token pack contains one each: Human token, Goblin token, Ooze token, Thopter token, Clue token, Dog token, Imp token, and Detective token
Theres certainly a broader range of tools for these decks now than theres ever been, but restricting yourself to colorless-only means youre missing out on core staples and effects that the colors of Magic provide