Fencer's Magemark — ruling 1

Each Magemark gives its bonus to the creature it's attached to, as long as the same player controls both the creature and the Aura.

Fencer's Magemark : règles, fonctionnement et interactions (MTG)

Fencer's Magemark 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

Enchant creature Creatures you control that are enchanted get +1/+1 and have first strike.

How it works : Fencer's Magemark

Original English text — Wizards of the Coast / Scryfall

#1February 1, 2006· Wizards of the Coast
Each Magemark gives its bonus to the creature it's attached to, as long as the same player controls both the creature and the Aura.
No other card is named in this ruling.