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.
Illustrated by
The Lost Caverns of Ixalan#286UncommonEnglishLegality
Rulings
Nov 10, 2023
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.
Nov 10, 2023
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.