Spellweaver Helix — ruling 1

A split card has the same name as a spell if either of its names is that spell’s name.

Spellweaver Helix — ruling 2

The creation of the copy and then the casting of the copy are both optional.

Spellweaver Helix — ruling 3

Spellweaver Helix’s second ability creates a copy of the imprinted card in the Exile zone (that’s where the imprinted sorcery card is), then allows you to cast it without paying its mana cost.

Spellweaver Helix — ruling 4

You cast the copy while this ability is resolving, and still on the stack. Normally, you’re not allowed to cast spells or activate abilities at this time. Spellweaver Helix’s ability breaks this rule. (The card that triggered this ability is also still on the stack.)

Spellweaver Helix — ruling 5

If there’s only one imprinted sorcery card, nothing happens.

Spellweaver Helix — ruling 6

You can’t cast the copy if an effect prevents you from casting sorceries or from casting that particular sorcery.

Spellweaver Helix — ruling 7

You can’t cast the copy unless all of its targets can be chosen.

Spellweaver Helix — ruling 8

If you don’t want to cast the copy, you can choose not to; the copy ceases to exist the next time state-based actions are checked.

Spellweaver Helix : règles, fonctionnement et interactions (MTG)

Spellweaver Helix 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

Imprint — When this artifact enters, you may exile two target sorcery cards from a single graveyard. Whenever a player casts a card, if it has the same name as one of the cards exiled with this artifact, you may copy the other. If you do, you may cast the copy without paying its mana cost.

How it works : Spellweaver Helix

Original English text — Wizards of the Coast / Scryfall

#1April 18, 2017· Wizards of the Coast
A split card has the same name as a spell if either of its names is that spell’s name.
No other card is named in this ruling.
#2March 1, 2005· Wizards of the Coast
The creation of the copy and then the casting of the copy are both optional.
No other card is named in this ruling.
#3December 1, 2004· Wizards of the Coast
Spellweaver Helix’s second ability creates a copy of the imprinted card in the Exile zone (that’s where the imprinted sorcery card is), then allows you to cast it without paying its mana cost.
No other card is named in this ruling.
#4December 1, 2004· Wizards of the Coast
You cast the copy while this ability is resolving, and still on the stack. Normally, you’re not allowed to cast spells or activate abilities at this time. Spellweaver Helix’s ability breaks this rule. (The card that triggered this ability is also still on the stack.)
No other card is named in this ruling.
#5December 1, 2004· Wizards of the Coast
If there’s only one imprinted sorcery card, nothing happens.
No other card is named in this ruling.
#6December 1, 2004· Wizards of the Coast
You can’t cast the copy if an effect prevents you from casting sorceries or from casting that particular sorcery.
No other card is named in this ruling.
#7December 1, 2004· Wizards of the Coast
You can’t cast the copy unless all of its targets can be chosen.
No other card is named in this ruling.
#8December 1, 2004· Wizards of the Coast
If you don’t want to cast the copy, you can choose not to; the copy ceases to exist the next time state-based actions are checked.
No other card is named in this ruling.
#9December 1, 2004· Wizards of the Coast
You don’t pay the spell’s mana cost. If a spell has X in its mana cost, X is 0. You do pay any additional costs for that spell. You can’t use any alternative costs.
No other card is named in this ruling.
#10December 1, 2004· Wizards of the Coast
If the two imprinted sorcery cards have the same name and a card with that name is cast, only one copy is created, not two.
No other card is named in this ruling.
#11October 4, 2004· Wizards of the Coast
If this card leaves the battlefield while the ability to make a copy is on the stack, the ability will still make a copy using the last-known-information rule.
No other card is named in this ruling.
#12October 4, 2004· Wizards of the Coast
If the imprinted card leaves the exile zone while the ability to make a copy is on the stack, then no copy will be made.
No other card is named in this ruling.