Destroys all their stuff and not yours

At the beginning of your upkeep, destroy all artifacts and enchantments. They can't be regenerated.

All permanents are enchantments in addition to their other types.

Other enchantments you control have shroud. (A permanent with shroud can't be the target of spells or abilities.) Enchanted creatures you control have shroud.

Enchant permanent Enchanted permanent has indestructible. (Effects that say "destroy" don't destroy that permanent. A creature with indestructible can't be destroyed by damage.)