Get at least four elves out, to include
Elvish Archdruid
. Cast and equip
Umbral Mantle
to the Archdruid. Tap the Archdruid for four or more green mana. Use three of it and the Mantle's activated ability cost to untap the Archdruid. Rinse and repeat for infinite green mana.
Cast
Genesis Wave
for where X is the exact amount of cards left in your library - or just some arbitrary amount - to put at least
Azure Mage
,
Door to Nothingness
,
Elixir of Immortality
,
Gemstone Array
,
Mindslaver
, and
Upwelling
onto the battlefield. Use
Elixir of Immortality
to shuffle all your spells that you dumped with the Wave back into your library. Keep a
Hive Mind
in your hand.
Wash your infinite green mana into some blue using
Gemstone Array
so you can draw the rest of your library using
Azure Mage
.
Wash some more green mana into red and give your Doors away, tapped, using
Harmless Offering
to each opponent. (
Donate
works here too, but I think it's funnier with
Harmless Offering
. I mean, can you refuse that face?)
Cast
Hive Mind
, then cast
Channel the Suns
, which gets copied by
Hive Mind
by all other players. Do this at least twice so everyone has . Then sacrifice your
Mindslaver
and take an opponent's turn. (If you have more than one opponent, use
Azure Mage
to re-draw your
Elixir of Immortality
and use it to return your
Mindslaver
to your library, then redraw it with
Azure Mage
and cast it again to sac for all other players.) End your turn.
Upwelling
keeps all the mana from
Channel the Suns
in each player's mana pool. As you take over other players' turns, use this mana to activate their newly-acquired, now-untapped
Door to Nothingness
and target "themselves." Laugh maniacally.
If you didn't have enough Doors to go around, use
Elixir of Immortality
yet again to shuffle your Doors back into your library, then repeat this whole mess again. (Since you took everyone's turn away from them, even if you don't have a Door to use, you can essentially "skip" their turn to get back to yours.) Continue to laugh maniacally.
Prepare to never be able to use this deck again with the same people.