Underrated Cards - Kaiser Colloseum?

[Seabs]

To me, this is basically the card that can stop all synchro, dark world, xyz, etc. decks in their tracks, as it's a great anti-swarm card. Basically, it makes it so that your opponent can only have as many monsters as you have, so if you just have a reaper/marshmallon/etc. that can't be destroyed by battle on the field and enough negation (Dark Bribe, etc.) to keep it going, this lock can be incredibly effective. Do you know of any cards that would be good support for such a strategy?

[shyguysteve]

I agree for the 'stop swarming' this card does. Its real useful for my union monsters to be able to stand a chance until I can get their corresponding monster on the field.

[† RazorDan]

I agree. I have it all my decks, very effective.

[sharingunneji]

As long as Darkworlds have Grapha to ditch from their hand, that card only acts as a target bait, it might slow them down, but stop them? Not really in my opinion

[Xitrons]

Wind-Up Rabbit.