Kinetic Ooze — ruling 1

If a permanent has {X} in its mana cost, X is 0 for the purpose of determining its mana value.

Kinetic Ooze : règles, fonctionnement et interactions (MTG)

Kinetic Ooze 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

This creature enters with X +1/+1 counters on it. When this creature enters, destroy up to one target artifact or enchantment with mana value X or less. If X is 5 or more, you draw a card. If X is 10 or more, double the number of +1/+1 counters on any number of other target creatures.

How it works : Kinetic Ooze

Original English text — Wizards of the Coast / Scryfall

#1March 20, 2026· Wizards of the Coast
If a permanent has in its mana cost, X is 0 for the purpose of determining its mana value.
No other card is named in this ruling.