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Hissing Quagmire is one of the weaker cards in this dual land cycle

There was a control deck that wasn't playing any creatures at all, that snuck a copy of Kaheera into their sideboard as a free eighth card

Invasion of InnistradInvasion of Innistrad Hm, a bit of a grim note here

Untapping Grim Monolith and Thran Dynamo, and occasionally even Mana Vault, it grants extra mana even the turn you put it into play and turns what was supposed to be a one time boost of mana into a bigger continuous boost of mana while having additional side uses untapping other things, with the traditional creature worth untapping being Phyrexian Colossus

Take the Pokemon with Self- destruct/Explosion out early on and you shouldn't have a problem

Lands like Temple of Mystery and Temple of Silence fit naturally into Commander builds where early tempo is less important than the overall long-term stability