For example, I have a Scion of the Ur-Dragon deck that can kill people in around three turns, its a blast to play, but one I rarely use as its a little higher on the power scale than anything my friends build
This synergy has shown up in Modern Deaths Shadow lists but really makes its presence felt in Legacy alongside Dark Depths
Even Modern and Pioneer pillowfort decks with other cards like Propaganda and Ghostly Prison would be another great home for Orbs of Warding
Having access to the right lands can greatly increase the number of decks you can play
Green has reasonable access to card draw, its got the best creatures, the best ways to gain a mana advantage, and its even got decent removal with fight effects like Primal Might and artifact and enchantment hate like Nature's Claim
As Alchemy exclusives, Kardum, Patron of Flames and Gutmorn, Pactbound Servant cant be your commander either, at least not outside of Brawl