Tell them you're running a "Rabid Wombat Tribal Deck"
Generally speaking, in decks that are three or more colors, you want to play almost all dual lands, along with enough basic lands to support whatever ramp is in your deck (Land Tax, Kodama's Reach, Rampant Growth, et al.)
(This ability triggers only from the battlefield.) : Return this card from your graveyard to the battlefield tapped
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The second ability of Cid, Timeless Artificer also lets you ignore the "singleton" rule in formats like Commander
I was a bit critical at first, because I thought cramming all 16 games into one set would be a bit chaotic