Thread:Maxus1576/@comment-38174351-20190906203835/@comment-7341673-20190907024523

I only vaguely remember making them, but"

- They go in the Main Deck (I Think)

- There's a new Zone called the "Omega Zone" (each player gets 1).

- During your Main Phase, you can put an Omega Monster face-down into your Omega Zone.

- Omega Monsters have a location & an action in their text («Chaos» Diabolos for example has GY as its location & Attack declared as its action).

- Each time the its respective action is performed while an Omega Monster is in the Omega Zone, you put the top card from the respective location on top of the Omega Monster in the Omega Zone.

- During your Main Phase, if the number of cards on top of the Omega Monster is equal to its Alpha (also indicated in its card text), you can send all the face-up cards in your Omega Zone to the GY and Omega Summon the Omega Monster.

- Because Omega Monsters require a lot to Summon, they tend to be more powerful than standard monsters of the same Level, in terms of ATK, DEF, and effects.

That's roughly how I remember them working.