Rainbow OTKaios

A deck based around quickely and consistently getting the Kaios Medalion's combo.

Due to the huge amount of draws and cycling, you can reliably get your 1ofs cards in your hands at the time you need them.

For the same reason, don't hesitate to use your first one or two keeper to reduce your hand, even if it contains Fugoro or Kaios (you maybe should keep your last one for consistency though).

Beware overdraws and save up Faeria, without reduction, you'll need 16 to pull the whole combo, plus an extra 3 if you want to engineer, or an extra 2 if you want to demon wrangler the stormspwawn.

Sometimes, playing Kaios before the whole combo is possible if you think your opponent can't remove it. I'd say playing Fugoro before the combo is less optimal than stalling one more turn with another creature.

Octopus and yak are insane versatile tools. The taunt of the keeper can be handy, but you mainly want to use it as an economic card, on a full hand.

Hellfire is tech against doomsday mostly, or red full clears.