Sleeper Agent — ruling 1

This card is a bit weird. When it enters under your control, you give control of it to an opponent. After that it damages them each turn because the "you" on the card means its controller.

Sleeper Agent : règles, fonctionnement et interactions (MTG)

Sleeper Agent 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 opponent gains control of it. At the beginning of your upkeep, this creature deals 2 damage to you.

How it works : Sleeper Agent

Original English text — Wizards of the Coast / Scryfall

#1October 4, 2004· Wizards of the Coast
This card is a bit weird. When it enters under your control, you give control of it to an opponent. After that it damages them each turn because the "you" on the card means its controller.
No other card is named in this ruling.