Meteor Blast — ruling 1

Meteor Blast can’t target the same permanent or player more than once.

Meteor Blast — ruling 2

If some but not all of Meteor Blast’s targets have become illegal by the time it tries to resolve, it will deal damage to the remaining legal targets. Illegal targets won’t be affected.

Meteor Blast : règles, fonctionnement et interactions (MTG)

Meteor Blast 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

Meteor Blast deals 4 damage to each of X targets.

How it works : Meteor Blast

Original English text — Wizards of the Coast / Scryfall

#1November 4, 2015· Wizards of the Coast
Meteor Blast can’t target the same permanent or player more than once.
No other card is named in this ruling.
#2November 4, 2015· Wizards of the Coast
If some but not all of Meteor Blast’s targets have become illegal by the time it tries to resolve, it will deal damage to the remaining legal targets. Illegal targets won’t be affected.
No other card is named in this ruling.