Titanic Brawl — ruling 1

If either target is an illegal target as Titanic Brawl resolves, neither creature will deal or be dealt damage.

Titanic Brawl : règles, fonctionnement et interactions (MTG)

Titanic Brawl 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 costs less to cast if it targets a creature you control with a +1/+1 counter on it. Target creature you control fights target creature you don't control. (Each deals damage equal to its power to the other.)

How it works : Titanic Brawl

Original English text — Wizards of the Coast / Scryfall

#1January 25, 2019· Wizards of the Coast
If either target is an illegal target as Titanic Brawl resolves, neither creature will deal or be dealt damage.
No other card is named in this ruling.