Qal Sisma Behemoth — ruling 1

If an effect says that Qal Sisma Behemoth must attack or block if able, you can choose not to pay the associated cost and ignore that requirement. Players are never forced to pay a cost to attack or block.

Qal Sisma Behemoth : règles, fonctionnement et interactions (MTG)

Qal Sisma 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 creature can't attack or block unless you pay .

How it works : Qal Sisma Behemoth

Original English text — Wizards of the Coast / Scryfall

#1February 25, 2015· Wizards of the Coast
If an effect says that Qal Sisma Behemoth must attack or block if able, you can choose not to pay the associated cost and ignore that requirement. Players are never forced to pay a cost to attack or block.
No other card is named in this ruling.