A thousand blooms – infinite mana in Lorwyn block

Scuttlemutt.jpgBloomTender.jpgSeedcradleWitch.jpg
Everyone is already familiar at this point with the arbitarily-large-critter combo of Devoted Druid with Quillspike. Even before the full set spoiler came out, I suggested a Project-X-inspired Quillspike build here. Now, an arbitrarily large creature is a lot of fun, but can we set our sights even higher and shoot for an arbitrarily large amount of mana?
Yes. Read the extended for the somewhat-misleadingly named Thousand Bloom combo, all packaged and ready to go.

18 Creatures:
Seedcradle Witch
Bloom Tender
Wren’s Run Vanquisher
Scuttlemutt
Chameleon Colossus
18 Spells:
Thoughtseize
Nameless Inversion
Thousand-Year Elixer
Profane Command
Mind Spring
24 Land:
Gilt-Leaf Palace
Vivid Grove
Vivid Marsh
Mutavault
Reflecting Pool
Forest
Swamp

This is basically an elf deck wrapped around an infinite mana combo. Let’s break it down:
The Engine
The infinite mana engine in Thousand Bloom is the three-part combination of Bloom Tender, Scuttlemutt, and Seedcradle Witch. Here’s how it works:
Tap Scuttlemutt to turn one of your creatures into a five-color beastie until end of turn
Tap Bloom Tender for WUBRG (one mana of each color)
Pay 2WG to untap Bloom Tender (and incidentally give it +3/+3) using Seedcradle Witch
Congratulations. You have just generated one surplus mana, and can now cycle between Tender and Seedcradle an arbitrarily large number of times.
The Output
Okay, so we now have a giant pile of mana and, coincidentally, a HUGE Bloom Tender. What do we do with it? Well, the most direct option is to dump all that mana into a gigantic Profane Command, offing your opponent and winning the game. Alternately, if you have no Profanes in hand, you could use one of the Mind Springs to draw the rest of your deck, find a Profane, and win.
It’s possible, of course, to plug other open-ended effects into this engine. Maybe you’d prefer to have four Titan’s Revenge on top of the four Profanes, for extra kill card options? Perhaps two more Mind Springs to make the drawing easier.
Elixir?
I put the Thousand-Year Elixirs in so that this can be a one-turn combo, hopefully protected by some proactive Thoughtseizing. In this model, you keep the combo elements in hand, then Thoughtseize, drop the Elixir, and on the following turn drop the Engine and win.
Competitive?
Probably not, as written, since Thoughtseizes are the current build’s only defense against countermagic. You’d prefer to have counterspell backup of your own, or some more aggressive way to make sure your opponent is quiet on you turn. Regardless, the combo will surely shock someone who isn’t looking for an apparent elf deck to just drop three creatures and win.
Mainly, it was an exercise in having a reasonably sane infinite mana engine in block — and there it is. Enjoy.