Neglected Heirloom // Ashmouth Blade — ruling 1

When Neglected Heirloom transforms, it remains attached to the creature it's attached to. If the equipped creature transforms into a noncreature permanent, Neglected Heirloom will become unattached before it transforms into Ashmouth Blade.

Neglected Heirloom // Ashmouth Blade : règles, fonctionnement et interactions (MTG)

Neglected Heirloom // Ashmouth Blade 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

Equipped creature gets +1/+1. When equipped creature transforms, transform this Equipment. Equip Equipped creature gets +3/+3 and has first strike. Equip

How it works : Neglected Heirloom // Ashmouth Blade

Original English text — Wizards of the Coast / Scryfall

#1April 8, 2016· Wizards of the Coast
When Neglected Heirloom transforms, it remains attached to the creature it's attached to. If the equipped creature transforms into a noncreature permanent, Neglected Heirloom will become unattached before it transforms into Ashmouth Blade.
No other card is named in this ruling.