Threefold Signal — ruling 1

If you cast a spell that already has replicate while you have this permanent on the battlefield, the spell will have two replicate abilities: one with a replicate cost as printed on it, and one with a replicate cost of {3}. You may use either ability, or both abilities, to replicate the spell.

Threefold Signal : règles, fonctionnement et interactions (MTG)

Threefold Signal 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

When this artifact enters, scry 3. Each spell you cast that's exactly three colors has replicate . (When you cast it, copy it for each time you paid its replicate cost. You may choose new targets for the copies. A copy of a permanent spell becomes a token.)

How it works : Threefold Signal

Original English text — Wizards of the Coast / Scryfall

#1April 29, 2022· Wizards of the Coast
If you cast a spell that already has replicate while you have this permanent on the battlefield, the spell will have two replicate abilities: one with a replicate cost as printed on it, and one with a replicate cost of . You may use either ability, or both abilities, to replicate the spell.
No other card is named in this ruling.