Guardian Beast, and Nevinyrral's Disk

Prerequisites

• Guardian Beast on the battlefield
• Nevinyrral's Disk on the battlefield
• each turn available

Steps

1. Activate Nevinyrral's Disk by paying and tapping it, destroying all artifacts, creatures and enchantments
2. Your noncreature artifacts, including Nevinyrral's Disk, will not be destroyed, as they have indestructible due to Guardian Beast
3. Repeat during each of your turns

Results

• Destroy all artifacts opponents control during each of your turns
• Destroy all creatures during each of your turns
• Destroy all enchantments during each of your turns