Tajuru Preserver — ruling 1

As a spell or ability an opponent controls resolves, if it would force you to sacrifice a permanent (as the annihilator ability does), you just don’t. That part of the effect does nothing. If that spell or ability gives you the option to sacrifice a permanent (as Prowling Pangolin’s ability does), you can’t take that option.

Tajuru Preserver — ruling 2

If a spell or ability an opponent controls instructs you to perform an action unless you sacrifice a permanent (as Ogre Marauder does), you can’t choose to sacrifice a permanent. You must perform the action. On the other hand, if a spell or ability an opponent controls instructs you to sacrifice a permanent unless you perform an action (as Rishadan Brigand does), you can choose whether or not to perform the action. If you don’t perform the action, nothing happens, since you can’t sacrifice any permanents.

Tajuru Preserver — ruling 3

You may still sacrifice permanents to pay the costs of spells you cast and abilities you activate, or because a resolving spell or ability you control instructs or allows you to do so. Notably, you may still sacrifice Eldrazi Spawn creature tokens for mana.

Tajuru Preserver — ruling 4

You may sacrifice a permanent to pay the activation cost of an ability, even if that ability comes from a permanent an opponent controls (such as Excavation).

Tajuru Preserver — ruling 5

You may sacrifice a permanent as a special action, even if the effect that allows you to do so comes from an opponent’s permanent (such as Damping Engine or Volrath’s Curse). No one controls special actions.

Tajuru Preserver — ruling 6

This ability affects only sacrifices. It won’t stop a creature from being put into the graveyard due to lethal damage or having 0 toughness, and it won’t stop a permanent from being put into the graveyard due to the “legend rule.” None of these are sacrifices; they’re the result of game rules.

Tajuru Preserver : règles, fonctionnement et interactions (MTG)

Tajuru Preserver 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

Spells and abilities your opponents control can't cause you to sacrifice permanents.

How it works : Tajuru Preserver

Original English text — Wizards of the Coast / Scryfall

#1June 15, 2010· Wizards of the Coast
As a spell or ability an opponent controls resolves, if it would force you to sacrifice a permanent (as the annihilator ability does), you just don’t. That part of the effect does nothing. If that spell or ability gives you the option to sacrifice a permanent (as Prowling Pangolin’s ability does), you can’t take that option.
No other card is named in this ruling.
#2June 15, 2010· Wizards of the Coast
If a spell or ability an opponent controls instructs you to perform an action unless you sacrifice a permanent (as Ogre Marauder does), you can’t choose to sacrifice a permanent. You must perform the action. On the other hand, if a spell or ability an opponent controls instructs you to sacrifice a permanent unless you perform an action (as Rishadan Brigand does), you can choose whether or not to perform the action. If you don’t perform the action, nothing happens, since you can’t sacrifice any permanents.
No other card is named in this ruling.
#3June 15, 2010· Wizards of the Coast
You may still sacrifice permanents to pay the costs of spells you cast and abilities you activate, or because a resolving spell or ability you control instructs or allows you to do so. Notably, you may still sacrifice Eldrazi Spawn creature tokens for mana.
No other card is named in this ruling.
#4June 15, 2010· Wizards of the Coast
You may sacrifice a permanent to pay the activation cost of an ability, even if that ability comes from a permanent an opponent controls (such as Excavation).
No other card is named in this ruling.
#5June 15, 2010· Wizards of the Coast
You may sacrifice a permanent as a special action, even if the effect that allows you to do so comes from an opponent’s permanent (such as Damping Engine or Volrath’s Curse). No one controls special actions.
No other card is named in this ruling.
#6June 15, 2010· Wizards of the Coast
This ability affects only sacrifices. It won’t stop a creature from being put into the graveyard due to lethal damage or having 0 toughness, and it won’t stop a permanent from being put into the graveyard due to the “legend rule.” None of these are sacrifices; they’re the result of game rules.
No other card is named in this ruling.