Their Number Is Legion — ruling 1

You must still pay its normal cost and follow all normal timing rules when casting Their Number is Legion from your graveyard using the permission granted by its last ability.

Their Number Is Legion : règles, fonctionnement et interactions (MTG)

Their Number Is Legion 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

Create X tapped 2/2 black Necron Warrior artifact creature tokens, then you gain life equal to the number of artifacts you control. Exile Their Number Is Legion. You may cast this card from your graveyard.

How it works : Their Number Is Legion

Original English text — Wizards of the Coast / Scryfall

#1October 7, 2022· Wizards of the Coast
You must still pay its normal cost and follow all normal timing rules when casting Their Number is Legion from your graveyard using the permission granted by its last ability.
No other card is named in this ruling.