Urborg Scavengers — ruling 1

If the target of the first ability is an illegal target at the time the ability tries to resolve (likely because it left the graveyard in response), the ability won't resolve and none of its effects will happen. You won't put a +1/+1 counter on Urborg Scavengers.

Urborg Scavengers : règles, fonctionnement et interactions (MTG)

Urborg Scavengers 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 this creature enters or attacks, exile target card from a graveyard. Put a +1/+1 counter on this creature. This creature has flying as long as a card exiled with it has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

How it works : Urborg Scavengers

Original English text — Wizards of the Coast / Scryfall

#1May 12, 2023· Wizards of the Coast
If the target of the first ability is an illegal target at the time the ability tries to resolve (likely because it left the graveyard in response), the ability won't resolve and none of its effects will happen. You won't put a +1/+1 counter on Urborg Scavengers.
No other card is named in this ruling.