Mask of Riddles — ruling 1

If a Mask of Riddles you control somehow winds up equipping a creature you don't control, Mask of Riddles's triggered ability will still trigger whenever that creature deals combat damage to a player (even if that player is you). You will control that ability, so you may draw a card.

Mask of Riddles : règles, fonctionnement et interactions (MTG)

Mask of Riddles 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 has fear. (It can't be blocked except by artifact creatures and/or black creatures.) Whenever equipped creature deals combat damage to a player, you may draw a card. Equip

How it works : Mask of Riddles

Original English text — Wizards of the Coast / Scryfall

#1May 1, 2009· Wizards of the Coast
If a Mask of Riddles you control somehow winds up equipping a creature you don't control, Mask of Riddles's triggered ability will still trigger whenever that creature deals combat damage to a player (even if that player is you). You will control that ability, so you may draw a card.
No other card is named in this ruling.