White's strengths are a host of small creatures that collectively become powerful, life-gaining, or evasive
As long as your devotion to green is less than five, Nylea isn't a creature
There were four warriors-matter cards in Khans of Tarkir (all in WB) and four Gates-matter cards in Guilds of Ravnica (one blue, one Boros, and two artifacts, which makes sense considering its the play-all-the-colors archetype)
Unlike Life-gain and Lands cards, Politics decks are a bit more freeform
//// Megatron, Destructive Force Color indicator: red, white, black Legendary Artifact Vehicle 4/5 Living metal (As long as it's your turn, this Vehicle is also a creature.) Whenever Megatron attacks, you may sacrifice another artifact