Duskmantle Seer — ruling 1

The loss of life is simultaneous. If this causes both players to end up at 0 or less life, the game will be a draw. In a multiplayer game, players with 0 or less life will lose the game.

Duskmantle Seer — ruling 2

The cards put into hands this way are not “drawn.” For example, you couldn’t reveal a card with miracle put into your hand this way (but it also won’t count as the first card you’ve drawn this turn either).

Duskmantle Seer : règles, fonctionnement et interactions (MTG)

Duskmantle Seer 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

Flying At the beginning of your upkeep, each player reveals the top card of their library, loses life equal to that card's mana value, then puts it into their hand.

How it works : Duskmantle Seer

Original English text — Wizards of the Coast / Scryfall

#1January 24, 2013· Wizards of the Coast
The loss of life is simultaneous. If this causes both players to end up at 0 or less life, the game will be a draw. In a multiplayer game, players with 0 or less life will lose the game.
No other card is named in this ruling.
#2January 24, 2013· Wizards of the Coast
The cards put into hands this way are not “drawn.” For example, you couldn’t reveal a card with miracle put into your hand this way (but it also won’t count as the first card you’ve drawn this turn either).
No other card is named in this ruling.