Cheapest priced copy (Commander 2018): $0.69 at Card Kingdom, near mint, their price list as of .
Enchanter's Bane 
Enchantment · Rare · Commander 2018 · #21
At the beginning of your end step, target enchantment deals damage equal to its mana value to its controller unless that player sacrifices it.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.69 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2018 | 21 | Rare | $0.69 | — |
| Duskmourn: House of Horror Commander | 164 | Rare | $0.79 | — |
One ruling from Wizards of the Coast
- 13 July 2018If there are no other enchantments on the battlefield, the triggered ability of Enchanter's Bane must target Enchanter's Bane.