Options include: Ancient Tomb, Nykthos, Shrine to Nyx, Myriad Landscape, Mana Crypt, Mana Vault, Wayfarer's Bauble, Surveyor's Scope, Coldsteel Heart, Marble Diamond, Pearl Medallion, Knight of the White Orchid, Sol Ring, Thran Dynamo, Worn Powerstone, Burnished Hart, Solemn Simulacrum, Kor Cartographer, Extraplanar Lens, Gauntlet of Power, Caged Sun
Once you have the city's blessing, you have it for the rest of the game, even if you lose control of some or all your permanents
When Gruff Triplets enters the battlefield, so long as its not a token, you make two token copies of it
The thing was that you can cheat it too easily into play and after youve done that, its just way too efficient an engine
Its a Wizard that allows for deck synergies
In the abstract, theres a lot to like