Cheapest priced copy (Commander 2018): $7.49 at Card Kingdom, near mint, their price list as of .
Myth Unbound 
Enchantment · Rare · Commander 2018 · #32
Your commander costs {1} 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.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $7.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2018 | 32 | Rare | $7.49 | — |
4 rulings from Wizards of the Coast
- 13 July 2018Myth Unbound’s cost reduction applies after you apply the commander tax. In effect, this reduces the commander tax to {1}.
- 13 July 2018Myth Unbound’s cost reduction applies even if you’re casting your commander from a zone other than the command zone.
- 13 July 2018If Myth Unbound leaves the battlefield at the same time as your commander is put into the command zone, its last ability won’t trigger.
- 7 December 2018If another player is somehow able to cast your commander, Myth Unbound’s first ability applies to that player’s spell.