Acornelia, Fashionable Filcher — ruling 1

If you cast a Squirrel spell that depicts a squirrel (as most do), you'd get two acorn counters: one when you cast the spell, and another when the spell resolves and the Squirrel enters the battlefield.

Acornelia, Fashionable Filcher — ruling 2

You retain all acorn counters in your stash until you spend them, even if you lose control of Acornelia.

Acornelia, Fashionable Filcher : règles, fonctionnement et interactions (MTG)

Acornelia, Fashionable Filcher 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 you cast a spell with a squirrel in its art, you get (an acorn counter). Whenever a Squirrel you control enters or dies, you get . , Pay X : Target creature gets -X/-X until end of turn. , Pay X : Target creature gets +X/+X until end of turn.

How it works : Acornelia, Fashionable Filcher

Original English text — Wizards of the Coast / Scryfall

#1February 29, 2020· Wizards of the Coast
If you cast a Squirrel spell that depicts a squirrel (as most do), you'd get two acorn counters: one when you cast the spell, and another when the spell resolves and the Squirrel enters the battlefield.
No other card is named in this ruling.
#2February 29, 2020· Wizards of the Coast
You retain all acorn counters in your stash until you spend them, even if you lose control of Acornelia.
No other card is named in this ruling.