Vorthos, Steward of Myth — ruling 1

You can choose any Magic character that has ever appeared in any official product or story, including characters that have appeared only in art. You can even choose characters who don’t have official names, as long as they’re clearly defined characters, like the Wanderer.

Vorthos, Steward of Myth — ruling 2

Vorthos’s ability applies to any spell in which the chosen character’s name appears in any form, whether that’s possessive (e.g. Teferi and Teferi’s Protection), or a related word (e.g. Avacyn and Avacynian Priest), or a word that’s derived from their name (e.g. Niv-Mizzet and Izzet Charm).

Vorthos, Steward of Myth — ruling 3

If a character has gone by different names, you may count all versions of that character. For example, choosing Lim-Dûl will offer you a discount on (SPOILERS) The Raven Man. Choosing Urza will offer you a discount on (SPOILERS BUT VERY OLD ONES) Blind Seer.

Vorthos, Steward of Myth — ruling 4

As with other acorn cards, Vorthos cares only about the actual printed card you’re casting to determine whether the chosen character appears. But would Vorthos want it any other way?

Vorthos, Steward of Myth — ruling 5

Vorthos’s ability cares whether the chosen character appears in the name, flavor text, or art of the card. It doesn’t care about rules text, watermark, set symbol, artist, and so on. No, choosing Maro as your character doesn’t let you get a discount on Look at Me, I’m the DCI.

Vorthos, Steward of Myth — ruling 6

Unlike most abilities that reduce the costs of spells, Vorthos’s ability cannot be applied to generic mana costs. For example, a spell that costs {2}{B}{G} to cast would instead cost {2} to cast. One that costs {4}{U}{U} would instead cost {4}{U}.

Vorthos, Steward of Myth : règles, fonctionnement et interactions (MTG)

Vorthos, Steward of Myth 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

As Vorthos, Steward of Myth enters, choose a named Magic character. Each spell you cast with the chosen character in its name, flavor text, or art costs less to cast. This effect reduces only the amount of colored mana you pay.

How it works : Vorthos, Steward of Myth

Original English text — Wizards of the Coast / Scryfall

#1October 7, 2022· Wizards of the Coast
You can choose any Magic character that has ever appeared in any official product or story, including characters that have appeared only in art. You can even choose characters who don’t have official names, as long as they’re clearly defined characters, like the Wanderer.
No other card is named in this ruling.
#2October 7, 2022· Wizards of the Coast
Vorthos’s ability applies to any spell in which the chosen character’s name appears in any form, whether that’s possessive (e.g. Teferi and Teferi’s Protection), or a related word (e.g. Avacyn and Avacynian Priest), or a word that’s derived from their name (e.g. Niv-Mizzet and Izzet Charm).
No other card is named in this ruling.
#3October 7, 2022· Wizards of the Coast
If a character has gone by different names, you may count all versions of that character. For example, choosing Lim-Dûl will offer you a discount on (SPOILERS) The Raven Man. Choosing Urza will offer you a discount on (SPOILERS BUT VERY OLD ONES) Blind Seer.
No other card is named in this ruling.
#4October 7, 2022· Wizards of the Coast
As with other acorn cards, Vorthos cares only about the actual printed card you’re casting to determine whether the chosen character appears. But would Vorthos want it any other way?
No other card is named in this ruling.
#5October 7, 2022· Wizards of the Coast
Vorthos’s ability cares whether the chosen character appears in the name, flavor text, or art of the card. It doesn’t care about rules text, watermark, set symbol, artist, and so on. No, choosing Maro as your character doesn’t let you get a discount on Look at Me, I’m the DCI.
No other card is named in this ruling.
#6October 7, 2022· Wizards of the Coast
Unlike most abilities that reduce the costs of spells, Vorthos’s ability cannot be applied to generic mana costs. For example, a spell that costs to cast would instead cost to cast. One that costs would instead cost .
No other card is named in this ruling.