Hour of Promise — ruling 1

There 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.

Hour of Promise — ruling 2

When Hour of Promise checks the number of Deserts you control, it includes any Deserts you found earlier with Hour of Promise.

Hour of Promise : règles, fonctionnement et interactions (MTG)

Hour of Promise is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

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.

How it works : Hour of Promise

Original English text — Wizards of the Coast / Scryfall

#1January 19, 2018· Wizards of the Coast
There 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.
No other card is named in this ruling.
#2July 14, 2017· Wizards of the Coast
When Hour of Promise checks the number of Deserts you control, it includes any Deserts you found earlier with Hour of Promise.
No other card is named in this ruling.