Laquatus's Champion — ruling 1

As Laquatus's Champion's second ability resolves, the player who gains 6 life is the player who was the target of the first ability (or, if that ability is still on the stack, the player who is its target).

Laquatus's Champion : règles, fonctionnement et interactions (MTG)

Laquatus's Champion 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

When this creature enters, target player loses 6 life. When this creature leaves the battlefield, that player gains 6 life. : Regenerate this creature.

How it works : Laquatus's Champion

Original English text — Wizards of the Coast / Scryfall

#1March 16, 2018· Wizards of the Coast
As Laquatus's Champion's second ability resolves, the player who gains 6 life is the player who was the target of the first ability (or, if that ability is still on the stack, the player who is its target).
No other card is named in this ruling.