Silvergill Douser — ruling 1

A permanent that’s both a Merfolk and a Faerie is counted only once when determining X.

Silvergill Douser — ruling 2

The value of X is determined when Silvergill Douser’s ability resolves. It won’t change later, even if the number of Merfolk and/or Faeries you control changes.

Silvergill Douser : règles, fonctionnement et interactions (MTG)

Silvergill Douser 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

: Target creature gets -X/-0 until end of turn, where X is the number of Merfolk and/or Faeries you control.

How it works : Silvergill Douser

Original English text — Wizards of the Coast / Scryfall

#1October 1, 2007· Wizards of the Coast
A permanent that’s both a Merfolk and a Faerie is counted only once when determining X.
No other card is named in this ruling.
#2October 1, 2007· Wizards of the Coast
The value of X is determined when Silvergill Douser’s ability resolves. It won’t change later, even if the number of Merfolk and/or Faeries you control changes.
No other card is named in this ruling.