Myth Unbound — ruling 1

If another player is somehow able to cast your commander, Myth Unbound’s first ability applies to that player’s spell.

Myth Unbound — ruling 2

Myth Unbound’s cost reduction applies after you apply the commander tax. In effect, this reduces the commander tax to {1}.

Myth Unbound — ruling 3

Myth Unbound’s cost reduction applies even if you’re casting your commander from a zone other than the command zone.

Myth Unbound — ruling 4

If Myth Unbound leaves the battlefield at the same time as your commander is put into the command zone, its last ability won’t trigger.

Myth Unbound : règles, fonctionnement et interactions (MTG)

Myth Unbound 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

Your commander costs less to cast for each time it's been cast from the command zone this game. Whenever your commander is put into the command zone from anywhere, draw a card.

Complete guide

Myth Unbound is a powerful enchantment designed to alleviate the pressure of the 'commander tax' in long games of Commander. It ensures that as the game progresses, your legendary leader remains accessible while turning their departures into fresh card advantage.

Halving the Commander Tax

Normally, each time you cast your commander from the command zone, it costs an additional {2} to cast for each previous time. Myth Unbound's first ability reduces the cost of your commander by {1} for each time it has been cast from the command zone. Since the tax increases by {2} and this reduces it by {1}, the effective cost increase is cut in half, making each subsequent cast only {1} more expensive than the previous one.

Step-by-Step Resolution

When you choose to cast your commander, you first determine the total cost. You start with the base mana cost, add any cost increases (like the commander tax), and then apply cost reductions. Myth Unbound checks how many times the commander was cast from the command zone and subtracts that many generic mana from the total. Note that this reduction applies even if you are casting the commander from a different zone, such as your hand or graveyard, though it only counts previous casts that originated from the command zone.

Card Draw Mechanics

The second ability is a triggered ability that occurs whenever your commander is moved to the command zone from anywhere. This includes moving there from the battlefield, the graveyard, or even exile. However, if Myth Unbound is destroyed at the exact same time as your commander (for example, by a spell that destroys all nonland permanents), the ability will not trigger because Myth Unbound must be on the battlefield to 'see' the event occur.

Strategic Timing

This card is most effective in decks where the commander is a high-priority target for opponents or acts as a central combo piece that needs to be recast frequently. It pairs well with other 'draw when a creature enters' effects to ensure your hand stays full regardless of whether your commander is coming or going.

Interaction examples

Mitigating the Tax

If you are casting your commander for the third time from the command zone, the commander tax is normally {4}. With Myth Unbound on the battlefield, the cost is reduced by {2} (once for each previous cast), meaning you only pay the base cost plus {2} extra mana total.

Drawing into Answers

Sylvan Library

During your turn, if your commander is destroyed and you choose to put it into the command zone, Myth Unbound triggers and you draw a card. This happens independently of your draw step. Later, during your draw step, Sylvan Library allows you to see even more cards, helping you find the mana needed to take advantage of Myth Unbound's cost reduction.

Sustaining Board Presence

Garruk's Uprising

With both enchantments out, your commander becomes a resilient engine. When your commander is put into the command zone, Myth Unbound lets you draw a card. When you use your reduced mana cost to recast it, if its power is 4 or greater, Garruk's Uprising triggers to draw you another card upon its entry, effectively replacing the commander in your hand twice.

Guide written with AI from the official text and rulings. Official English text prevails.

How it works : Myth Unbound

Original English text — Wizards of the Coast / Scryfall

#1December 7, 2018· Wizards of the Coast
If another player is somehow able to cast your commander, Myth Unbound’s first ability applies to that player’s spell.
No other card is named in this ruling.
#2July 13, 2018· Wizards of the Coast
Myth Unbound’s cost reduction applies after you apply the commander tax. In effect, this reduces the commander tax to .
No other card is named in this ruling.
#3July 13, 2018· Wizards of the Coast
Myth Unbound’s cost reduction applies even if you’re casting your commander from a zone other than the command zone.
No other card is named in this ruling.
#4July 13, 2018· Wizards of the Coast
If Myth Unbound leaves the battlefield at the same time as your commander is put into the command zone, its last ability won’t trigger.
No other card is named in this ruling.