Spell Crumple — ruling 1

If the spell is an illegal target when Spell Crumple tries to resolve, it won’t resolve and none of its effects will happen. Spell Crumple will be put into its owner’s graveyard.

Spell Crumple — ruling 2

If the targeted spell can’t be countered, it won’t be put onto the bottom of its owner’s library. Spell Crumple will still be put on the bottom of its owner’s library.

Spell Crumple : règles, fonctionnement et interactions (MTG)

Spell Crumple is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Counter target spell. If that spell is countered this way, put it on the bottom of its owner's library instead of into that player's graveyard. Put Spell Crumple on the bottom of its owner's library.

How it works : Spell Crumple

Original English text — Wizards of the Coast / Scryfall

#1September 22, 2011· Wizards of the Coast
If the spell is an illegal target when Spell Crumple tries to resolve, it won’t resolve and none of its effects will happen. Spell Crumple will be put into its owner’s graveyard.
No other card is named in this ruling.
#2September 22, 2011· Wizards of the Coast
If the targeted spell can’t be countered, it won’t be put onto the bottom of its owner’s library. Spell Crumple will still be put on the bottom of its owner’s library.
No other card is named in this ruling.