Part in Friendship — ruling 1

If the revealed creature card has {X} in its mana cost, X is 0 for the purposes of determining its mana value.

Part in Friendship : règles, fonctionnement et interactions (MTG)

Part in Friendship 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

Whenever a nontoken creature you control dies, reveal cards from the top of your library until you reveal a creature card. If its mana value is less than or equal to the number of lands you control, put it onto the battlefield. Otherwise, put it into your hand. Put the rest on the bottom of your library in a random order. This ability triggers only once each turn.

How it works : Part in Friendship

Original English text — Wizards of the Coast / Scryfall

#1June 29, 2026· Wizards of the Coast
If the revealed creature card has in its mana cost, X is 0 for the purposes of determining its mana value.
No other card is named in this ruling.