Best collapse the dungeon spells?

Suppose you're in the underdark and there's an evil temple in a cave. You don't want to want to go into the temple because who knows what defenses they have, so your theory is to collapse things so the occupants come out. What would you use? Earthquake is an option but there's presumably people with dispel magic so it likely won't last more than one or two rounds.

Disintegrate to blast away a support pillar right in the middle of the main chamber, causing the roof to cave in.

Transmute Rock could be used the same way or directly on the ceiling.

Tsunami could be used to potentially take out multiple ceiling supports at once.

Delayed Blast Fireball cast as a circle spell so it's duration is 24 hours....creates an explosion that deals 14422d6 damage in its radius. Blow up the world.

If you want to get really wild...Dominate Monster to send in something big and terrifying like a Gargantua to wreck the place.

Decanter of endless Water and seal the door fram to flood the place once you set it inside the door and say the magic word.

Quote from Leaf_Onwind >>

Decanter of endless Water and seal the door fram to flood the place once you set it inside the door and say the magic word.

 Decanter of Endless Water requires an action and only produces water for one turn. Someone would have to be in the room to keep making water. Still, I like the idea of drowning a whole dungeon slowly.