Cheapest priced copy (Hour of Devastation): $0.35 at Card Kingdom, near mint, their price list as of .
Wall of Forgotten Pharaohs 
Artifact Creature — Wall · 0/4 · Common · Hour of Devastation · #168
Defender
{T}: This creature deals 1 damage to target player or planeswalker. Activate only if you control a Desert or there is a Desert card in your graveyard.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Hour of Devastation | 168 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 14 July 2017If an ability checks whether you control a Desert or there is a Desert card in your graveyard, having more than one doesn't matter. Controlling one is the same as controlling five. There is also no extra bonus for both controlling one and having one in your graveyard.