Spellbreaker Behemoth — ruling 1

Any spells or abilities that would counter Spellbreaker Behemoth or (once it’s on the battlefield) a creature spell you control with power 5 or greater can still be cast or activated and will still resolve. They just won’t counter that spell. Any other effects they have will happen as normal.

Spellbreaker Behemoth — ruling 2

Effects that affect a creature’s power (such as the one from Glorious Anthem, for example) apply only to creatures on the battlefield, not to creature spells on the stack.

Spellbreaker Behemoth — ruling 3

If a creature card has “*” in its power, the ability that defines “*” works in all zones, including the stack.

Spellbreaker Behemoth : règles, fonctionnement et interactions (MTG)

Spellbreaker Behemoth 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

This spell can't be countered. Creature spells you control with power 5 or greater can't be countered.

How it works : Spellbreaker Behemoth

Original English text — Wizards of the Coast / Scryfall

#1May 1, 2009· Wizards of the Coast
Any spells or abilities that would counter Spellbreaker Behemoth or (once it’s on the battlefield) a creature spell you control with power 5 or greater can still be cast or activated and will still resolve. They just won’t counter that spell. Any other effects they have will happen as normal.
No other card is named in this ruling.
#2May 1, 2009· Wizards of the Coast
Effects that affect a creature’s power (such as the one from Glorious Anthem, for example) apply only to creatures on the battlefield, not to creature spells on the stack.
No other card is named in this ruling.
#3May 1, 2009· Wizards of the Coast
If a creature card has “*” in its power, the ability that defines “*” works in all zones, including the stack.
No other card is named in this ruling.