Yeah, this is a very good card, it is very much well stable in every deck... Leave it to me to write a review ;)
rareity=Ultra rare
[normle trap card]

efect:
"When an opponent's monster attacks, negate the attack and destroy all opponent's monsters in Attack Position."
This card probable should be played in every deck(there are some that wouldn't need it)so if you don't have one try to get one...
Pros:
-Clears the field
-Stalls
-protects your monsters/life points
Cons:
-it is a trap and can be destroyed before you can use it
-it doesn't destroy defs monsters