Cheapest priced copy (Modern Horizons 3 Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Hour of Promise 
Sorcery · Rare · Hour of Devastation · #120
Search your library for up to two land cards, put them onto the battlefield tapped, then shuffle. Then if you control three or more Deserts, create two 2/2 black Zombie creature tokens.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Hour of Devastation | 120 | Rare | $0.59 | $0.79 |
| Modern Horizons 3 Commander | 232 | Rare | $0.49 | $0.49 |
| Outlaws of Thunder Junction Commander | 195 | Rare | $0.49 | — |
| Hour of Devastation Promos | 120s | Rare | — | $4.49 |
2 rulings from Wizards of the Coast
- 14 July 2017When Hour of Promise checks the number of Deserts you control, it includes any Deserts you found earlier with Hour of Promise.
- 19 January 2018There are many important moments in the story, but the most crucial—called "story spotlights"—are shown on cards. These cards have the Planeswalker symbol in their text box; this symbol has no effect on gameplay. You can read more about these events in the official Magic fiction at http://www.mtgstory.com.