Well, let's see...
I made a
Yarok, the Desecrated "2-mana-instant-tribal" deck which was actually all built around
Isochron Scepter and the weirdness of imprint.
Speaking of imprint,
Spellweaver Helix is a thing. I've had various stabs at this but only really seem to like the Izzet one with
Veyran, Voice of Duality.
The one I'm struggling to make work is the one where I make token copies of
Mana Crypt and give them to people, until they die. I was using Zedruu, though I did also start cooking up an alternative with Blim which feels meaner but more workable.
My silliest deck is probably my Mutant
Ninja Turtles deck. Turns out, mutants and ninjas work together quite well and, well,
Archelos, Lagoon Mystic has all the right colours.
My favourite silly deck, though, is probably my
Obeka, Brute Chronologist one. People think it's weird to end your turn early but it turns out, it can be pretty great! This way, you don't have to worry about boring stuff stuff like phases, people never say "your turns take too long!" and you don't have to worry about the politics of who to attack. Drawing cards is overrated, and you can skip that too if you want! I've won once with this deck but don't particularly
wish to again.