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Good grief. This is expensive, but I couldn’t figure out any other way to make things work. Since no sane person will ever play this, consider it a thought exercise and pay no attention to those pricey lands.
•8 Basic Forests will give Quicksilver Fountain something to home in on when the time is right. Yes, that sounds strange, but it was actually more difficult to ensure we have something to turn into an Island than it was to simply avoid our key card altogether.
•Just one Ketria Triome because I hate them. They enter tapped, are part of that garish Ikoria expansion with its hideously ugly art aesthetic and visual language, and they’re expensive. Nevertheless, it will grant access to all the colors we may need and so here it is.
•Ahh, Breeding Pool
and Steam Vents
—here’s where things get technical. We need mostly for the first half of the game, and enough when we’re ready to pop off, so these two are the Shocklands we want. Why Shocklands? Simple; they’re already islands. Quicksilver Fountain only hits non-island lands, so these are exempt from Flood Counters. We still get our and our and don’t need to worry about that trash card interfering with them. Win-win.
•Wooded Foothills I’m actually not sure I’ll keep. If Quicksilver Fountain turns it into an Island it will also lose its ability to fetch, making it useless. However, since the fountain only hits at the beginning of each player’s upkeep we’ll have a whole turn in which to use it. Without extensive playtesting (why would anyone do that for this deck) I can only reason for now that the ability to fetch on command outweighs the potential irrelevance of the card if it be hit by a Flood Counter. It’s already here; I took the time to write this down; it stays.
•Oboro, Palace in the Clouds is here thanks to a suggestion by wallisface. We don’t ever want Quicksilver Fountain to ‘finish’ and make everything an Island and thus erase all those beautiful counters, so being able to interfere with it on command forestalls this. 4 copies were suggested, I’m going to try 3 and see how that works knowing I can always add the last if necessary.
•Lush Growth isn’t a land but I didn’t know where else to mention it. It’s easy to cast and is just a bit of extra insurance to make certain we have when we need it.