Elvish Vatkeeper — ruling 1

The target Incubator token transforms before its +1/+1 counters are doubled, so anything that cares about +1/+1 counters being placed on a creature will see them being placed on the Phyrexian artifact creature.

Elvish Vatkeeper : règles, fonctionnement et interactions (MTG)

Elvish Vatkeeper 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

When this creature enters, incubate 2. (Create an Incubator token with two +1/+1 counters on it and ": Transform this token." It transforms into a 0/0 Phyrexian artifact creature.) : Transform target Incubator token you control. Double the number of +1/+1 counters on it.

How it works : Elvish Vatkeeper

Original English text — Wizards of the Coast / Scryfall

#1April 14, 2023· Wizards of the Coast
The target Incubator token transforms before its +1/+1 counters are doubled, so anything that cares about +1/+1 counters being placed on a creature will see them being placed on the Phyrexian artifact creature.
No other card is named in this ruling.