Silverquill, the Disputant — ruling 1

Casualty N means "As an additional cost to cast this spell, you may sacrifice a creature with power N or greater." and "When you cast this spell, if a casualty cost was paid for it, copy it. If the spell has any targets, you may choose new targets for the copy."

Silverquill, the Disputant — ruling 2

You may sacrifice only one creature to pay a spell's casualty cost, and you copy the spell only once.

Silverquill, the Disputant — ruling 3

If you pay the casualty cost of a spell, the copy will resolve before the original spell.

Silverquill, the Disputant — ruling 4

The copy of the spell is created on the stack, so it's not "cast." Abilities that trigger when a player casts a spell won't trigger.

Silverquill, the Disputant : règles, fonctionnement et interactions (MTG)

Silverquill, the Disputant 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

Flying, vigilance Each instant and sorcery spell you cast has casualty 1. (As you cast that spell, you may sacrifice a creature with power 1 or greater. When you do, copy the spell and you may choose new targets for the copy.)

How it works : Silverquill, the Disputant

Original English text — Wizards of the Coast / Scryfall

#1March 20, 2026· Wizards of the Coast
Casualty N means "As an additional cost to cast this spell, you may sacrifice a creature with power N or greater." and "When you cast this spell, if a casualty cost was paid for it, copy it. If the spell has any targets, you may choose new targets for the copy."
No other card is named in this ruling.
#2March 20, 2026· Wizards of the Coast
You may sacrifice only one creature to pay a spell's casualty cost, and you copy the spell only once.
No other card is named in this ruling.
#3March 20, 2026· Wizards of the Coast
If you pay the casualty cost of a spell, the copy will resolve before the original spell.
No other card is named in this ruling.
#4March 20, 2026· Wizards of the Coast
The copy of the spell is created on the stack, so it's not "cast." Abilities that trigger when a player casts a spell won't trigger.
No other card is named in this ruling.