House Cartographer — ruling 1

If a creature's survival ability triggers but the creature leaves the battlefield before the ability resolves, use its tapped or untapped status as it last existed on the battlefield to determine whether or not the ability will do anything.

House Cartographer — ruling 2

If you reveal your entire library and don't reveal a land card, you'll put all revealed cards back in a random order. Since you were never instructed to shuffle your library, abilities that trigger whenever a player shuffles their library won't trigger.

House Cartographer — ruling 3

Survival abilities (and other abilities that trigger at the beginning of your second main phase) will trigger at the beginning of the second main phase you take in a turn. They won't trigger during your third, fourth, or other additional main phases in a single turn, if effects somehow cause you to have more than two main phases.

House Cartographer — ruling 4

If a creature with a survival ability isn't tapped when your second main phase begins, the ability won't trigger at all. You won't be able to tap it during your second main phase in time to have that ability trigger.

House Cartographer — ruling 5

If a creature's survival ability triggers but that creature is untapped when the ability begins to resolve, that ability won't do anything.

House Cartographer : règles, fonctionnement et interactions (MTG)

House Cartographer 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

Survival — At the beginning of your second main phase, if this creature is tapped, reveal cards from the top of your library until you reveal a land card. Put that card into your hand and the rest on the bottom of your library in a random order.

How it works : House Cartographer

Original English text — Wizards of the Coast / Scryfall

#1September 20, 2024· Wizards of the Coast
If a creature's survival ability triggers but the creature leaves the battlefield before the ability resolves, use its tapped or untapped status as it last existed on the battlefield to determine whether or not the ability will do anything.
No other card is named in this ruling.
#2September 20, 2024· Wizards of the Coast
If you reveal your entire library and don't reveal a land card, you'll put all revealed cards back in a random order. Since you were never instructed to shuffle your library, abilities that trigger whenever a player shuffles their library won't trigger.
No other card is named in this ruling.
#3September 20, 2024· Wizards of the Coast
Survival abilities (and other abilities that trigger at the beginning of your second main phase) will trigger at the beginning of the second main phase you take in a turn. They won't trigger during your third, fourth, or other additional main phases in a single turn, if effects somehow cause you to have more than two main phases.
No other card is named in this ruling.
#4September 20, 2024· Wizards of the Coast
If a creature with a survival ability isn't tapped when your second main phase begins, the ability won't trigger at all. You won't be able to tap it during your second main phase in time to have that ability trigger.
No other card is named in this ruling.
#5September 20, 2024· Wizards of the Coast
If a creature's survival ability triggers but that creature is untapped when the ability begins to resolve, that ability won't do anything.
No other card is named in this ruling.