Imskir Iron-Eater — ruling 1

The value of X is calculated only once, as Imskir Iron-Eater's triggered ability resolves.

Imskir Iron-Eater — ruling 2

Use the mana value of the sacrificed artifact as it last existed on the battlefield to determine how much damage is dealt.

Imskir Iron-Eater — ruling 3

If an artifact on the battlefield has {X} in its mana cost, X is 0 when determining its mana value.

Imskir Iron-Eater : règles, fonctionnement et interactions (MTG)

Imskir Iron-Eater 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

Affinity for artifacts (This spell costs less to cast for each artifact you control.) When Imskir enters, you draw X cards and you lose X life, where X is half the number of artifacts you control, rounded down. , Sacrifice an artifact: Imskir deals damage equal to the sacrificed artifact's mana value to any target.

How it works : Imskir Iron-Eater

Original English text — Wizards of the Coast / Scryfall

#1June 7, 2024· Wizards of the Coast
The value of X is calculated only once, as Imskir Iron-Eater's triggered ability resolves.
No other card is named in this ruling.
#2June 7, 2024· Wizards of the Coast
Use the mana value of the sacrificed artifact as it last existed on the battlefield to determine how much damage is dealt.
No other card is named in this ruling.
#3June 7, 2024· Wizards of the Coast
If an artifact on the battlefield has in its mana cost, X is 0 when determining its mana value.
No other card is named in this ruling.