Cheapest priced copy (Tarkir: Dragonstorm Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Overgrown Battlement 
Creature — Wall · 0/4 · Uncommon · The List · #IMA-180
Defender
{T}: Add {G} for each creature you control with defender.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
6 printings · $0.49 to $13.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Iconic Masters | 180 | Uncommon | $0.59 | $4.99Out of stock |
| Jumpstart | 417 | Uncommon | $0.69 | — |
| New Capenna Commander | 303 | Uncommon | $0.59 | — |
| The List | IMA-180 | Uncommon | $0.69Out of stock | — |
| Rise of the Eldrazi | 203 | Common | $0.69 | $13.99 |
| Tarkir: Dragonstorm Commander | 264 | Uncommon | $0.49 | — |
One ruling from Wizards of the Coast
- 17 November 2017Overgrown Battlement's last ability is a mana ability. It doesn't use the stack and can't be responded to (such as by removing creatures with defender you control).