Frenzied Saddlebrute — ruling 1

Frenzied Saddlebrute doesn't cause any creatures to gain haste. It just allows all creatures (including those you don't control) to attack as though they had haste if they're attacking your opponents or their planeswalkers.

Frenzied Saddlebrute : règles, fonctionnement et interactions (MTG)

Frenzied Saddlebrute 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

Haste All creatures can attack your opponents and planeswalkers your opponents control as though those creatures had haste.

How it works : Frenzied Saddlebrute

Original English text — Wizards of the Coast / Scryfall

#1November 10, 2020· Wizards of the Coast
Frenzied Saddlebrute doesn't cause any creatures to gain haste. It just allows all creatures (including those you don't control) to attack as though they had haste if they're attacking your opponents or their planeswalkers.
No other card is named in this ruling.