No problem man
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Instead of the guildgates, why not add extra cemeterys? That way, your lands aren't always coming in to play tapped, but they're still multi-colored. Also, I would recommend Grim Backwoods, as it helps with the whole graveyard aspect of your deck, and it allows you to draw a card.
I ran it with Death's Presence when I first made the deck, it screwed me over a bunch because it costs too much in my opinion, but yeah the Slitherheads will probly be moved in when I find them again xD