Blur of Blades — ruling 1

If the targeted creature is an illegal target by the time Blur of Blades resolves, it won’t resolve and none of its effects will happen. Blur of Blades won’t deal damage to any player.

Blur of Blades : règles, fonctionnement et interactions (MTG)

Blur of Blades 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

Put a -1/-1 counter on target creature. Blur of Blades deals 2 damage to that creature's controller.

How it works : Blur of Blades

Original English text — Wizards of the Coast / Scryfall

#1July 14, 2017· Wizards of the Coast
If the targeted creature is an illegal target by the time Blur of Blades resolves, it won’t resolve and none of its effects will happen. Blur of Blades won’t deal damage to any player.
No other card is named in this ruling.