Sigil of the Empty Throne, Mentally CHallenged Deck list

Tide Hollow Sculler x 3 wb 2/2 look at players hand remove from game, put back when THS is gone.
Nip Gwyllion x 4 w/b 1/1 life link
Nightsky Mimic x 4 1 w/b 2/1 when play w/b spell becomes 4/4 gains flying
Batwing Brume x 3 wb prevent all combat damage, opponent loses life = # attacking creatures.
Bitterblossom x 3 1b

Double Cleave x 3 1 w/r instant, creature gains double strike.
Edge of Divinity x 4 w/b +2/1 if black, +1/+2 if white
Unholy Strength x 4 b +2/1
Nomad Mythmaker x3 2w 2/2 w tap, put aura from grave attached to creature
Oblivion Ring x 4 2w
Sigil of the Empty Throne x 3

so not a lot of time on this one, main idea, nightsky mimic turn 2, turn 3 drop both edge of divinity and double cleave - pumps mimic to a 7/7 double strike flyer, maybe doing 14 damage.
bitterblossom with some unholy strength or a batwing brume to finish the job. If you make it to late game, you can use the nomad on bitterblossomed flyers to continually use Sigil over and over. none of this seems like a good idea, but red black white mimic deck seems like it might be fun instead.

the collective idea--more sigil decks

4x Path of Exile
4x Bitterblossom
4x Ashling's Prerogative
4x Oblivion Ring
4x Goblin Assault
4x Esper Charm
4x Cryptic Command
4x Wrath
3x Sigil of the Empty Throne
25 lands

Easily the worst deck I've built. Maybe ever.

4x Fertile Ground
4x Bitterblossom
4x Recumbent Bliss
4x Oblivion Ring
4x Esper Charm
4x Mirror Entity
3x Shared Animosity
2x Crucible of Fire
4x Wrath of God
3x Sigil of the Empty Throne

So the idea is to not have an early game, ideally waiting for a turn three (fertile ground turn two) or turn four or turn five wrath, then unload sigil, then next turn play the rest of the cards you are holding as quickly as possible. Here is a typical game.
Turn 1: land.
Turn 2: land, Bitterblossom.
Turn 3: land, fertile ground.
Turn 4: wrath.
Turn 5: land, Sigil.
Turn 6: land, Shared Animosity, Oblivion Ring.
Turn 7: swing for 12 in the air, drop a cruicible of fire and a mirror entity.
Turn 8: pump 1 mana into your mirror entity making all of your creatures 1/1 dragons, with the crucible making them 4/4 dragons, with shared animosity meaning you swing with four 7/7 creatures. You still have mana to play an o-ring, esper charm for opponent discard, or just hold onto cards to reload if they have a creature removal.

Or I could take out mirror entity and crucible of fire and add +3 cryptic command +3 mulldrifter, or something along those lines.
Shared Animosity is still valid because you have faerie tokens and angel tokens.
Yeah it is really, REALLY bad. But that is why it is fun.

Stupidest Challenge of the week evah!

Enchantments:
3x Sigil of the Empty Throne
4x Hoofprints of the Stag
4x Bitterblossom
4x Goblin Assault
4x Fertile Ground
4x Cryptic Command
4x Mulldrifter
4x Ponder
4x Path to Exile

25 lands (5 color stuffs)