Volatile Fault
Land — Cave
: Add 
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, , Sacrifice this land: Destroy target nonbasic land an opponent controls. That player may search their library for a basic land card, put it onto the battlefield, then shuffle. You create a Treasure token.
Andrew Mar
Rulings
If Volatile Fault's ability resolves, the target nonbasic land's controller gets to search for a basic land card even if the land wasn't destroyed by Volatile Fault's ability. This may happen because the land has indestructible. In this case, you'll still create a Treasure token.
(wotc • 2023-11-10)
If the target of Volatile Fault's last ability is illegal as the ability tries to resolve, it won't resolve and none of its effects will happen. You won't create a Treasure token.
(wotc • 2023-11-10)
Rulings
If Volatile Fault's ability resolves, the target nonbasic land's controller gets to search for a basic land card even if the land wasn't destroyed by Volatile Fault's ability. This may happen because the land has indestructible. In this case, you'll still create a Treasure token.
(wotc • 2023-11-10)
If the target of Volatile Fault's last ability is illegal as the ability tries to resolve, it won't resolve and none of its effects will happen. You won't create a Treasure token.
(wotc • 2023-11-10)