If you were to have a land type count as that color instead, you would allow Mtenda Lions and such, but disallow many more things
Elixirs ability will resolve first, and then my opponent will discard Warden (after the shuffle graveyard into library effect has already completed)
There are five mono-colour Bounce Lands that each produce one colour and one colourless mana: Karoo: white and colourless
Taigam, Master Opportunist Taigam, Master Opportunist loves that second spell you cast on a given turn, so much that you get a free copy suspended for later
My only real criticism of the deck is that the creature count seems a little high, and I wish that instead we could get at least one or two more new instant or sorcery spells
If you manage to flashback a card with Rebound or otherwise cast it from anywhere outside your hand, the Rebound doesn't trigger