Nevinyrral's disk + darksteel forge

[Madara the third]

The disk says destroy all atrifacts and other stuff ..but darksteel forge makes atrifacts I control indestructible ...so I can use disk every turn and it won't destroy itself since it can't be destroyed?

[Sparkle Ninja]

The disk says destroy all atrifacts and other stuff ..but darksteel forge makes atrifacts I control indestructible ...so I can use disk every turn and it won't destroy itself since it can't be destroyed?

I thought {Nivinyrral's disk} stated sacrifice.
Ok apparently not. So yes it is....

[FustyDavorite]

... I play both of these in my EDH and I thought it was a sac artifact.. What am I?