Nicol Bolas, the Deceiver — ruling 1

While resolving Nicol Bolas's first ability, your opponent chooses a card to be discarded without revealing it, chooses a nonland permanent to be sacrificed, or chooses to do neither. Then that player discards that card, sacrifices that permanent, or loses 3 life. Your opponent can always choose to lose 3 life, even if they have cards to discard or nonland permanents to sacrifice.

Nicol Bolas, the Deceiver — ruling 2

In a multiplayer game, each opponent in turn order makes their choice for Nicol Bolas's first ability, then all of the actions occur simultaneously. Opponents will know choices made by earlier opponents when making their choices, although a card chosen to be discarded this way isn't revealed until it's discarded.

Nicol Bolas, the Deceiver — ruling 3

If the target of Nicol Bolas's second ability becomes illegal, the ability doesn't resolve and you won't draw a card. If that target is legal but can't be destroyed, most likely because it has indestructible, you still draw a card.

Nicol Bolas, the Deceiver — ruling 4

If Nicol Bolas's third ability causes each opponent to have 0 or less life, but it also causes you to try to draw more cards than you have in your library, the game ends in a draw.

Nicol Bolas, the Deceiver : règles, fonctionnement et interactions (MTG)

Nicol Bolas, the Deceiver 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

+3: Each opponent loses 3 life unless that player sacrifices a nonland permanent of their choice or discards a card. −3: Destroy target creature. Draw a card. −11: Nicol Bolas deals 7 damage to each opponent. You draw seven cards.

How it works : Nicol Bolas, the Deceiver

Original English text — Wizards of the Coast / Scryfall

#1July 14, 2017· Wizards of the Coast
While resolving Nicol Bolas's first ability, your opponent chooses a card to be discarded without revealing it, chooses a nonland permanent to be sacrificed, or chooses to do neither. Then that player discards that card, sacrifices that permanent, or loses 3 life. Your opponent can always choose to lose 3 life, even if they have cards to discard or nonland permanents to sacrifice.
No other card is named in this ruling.
#2July 14, 2017· Wizards of the Coast
In a multiplayer game, each opponent in turn order makes their choice for Nicol Bolas's first ability, then all of the actions occur simultaneously. Opponents will know choices made by earlier opponents when making their choices, although a card chosen to be discarded this way isn't revealed until it's discarded.
No other card is named in this ruling.
#3July 14, 2017· Wizards of the Coast
If the target of Nicol Bolas's second ability becomes illegal, the ability doesn't resolve and you won't draw a card. If that target is legal but can't be destroyed, most likely because it has indestructible, you still draw a card.
No other card is named in this ruling.
#4July 14, 2017· Wizards of the Coast
If Nicol Bolas's third ability causes each opponent to have 0 or less life, but it also causes you to try to draw more cards than you have in your library, the game ends in a draw.
No other card is named in this ruling.

Interactions with other cards

These cards' text mentions Nicol Bolas, the Deceiver.

Visage of Bolas

When this artifact enters, you may search your library and/or graveyard for a card named Nicol Bolas, the Deceiver, reveal it, and put it into your hand. If you search your library this way, shuffle. {T}: Add {U}, {B}, or {R}.