Dark worlds vs Gravekeeper`s watcher

[greeneyescat]

Can GK Watcher negate cards such as dark world lightning and other cards used in the dark world deck?

 

[joeyinthemix]

Hello I think , it can negate cards like dark world dealings, dark coffin, dark deal , dragged down to the grave,dark world dealings, the effect of bronn and morphing jar...I hope it helps

 

[Jathro]

It will not negate discarding for costs, but discarding as part of an effect is fair game.

 

[densetsu_x]

Which is to say, yes it will negate Dark World Lightning, Dark World Dealings, Morphing Jar (that wasn't flipped as a result of battle), etc.