Water Servant — ruling 1

You can activate Water Servant's second ability even if doing so would cause Water Servant's power to be less than 0.

Water Servant : règles, fonctionnement et interactions (MTG)

Water Servant 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

: This creature gets +1/-1 until end of turn. : This creature gets -1/+1 until end of turn.

How it works : Water Servant

Original English text — Wizards of the Coast / Scryfall

#1August 15, 2010· Wizards of the Coast
You can activate Water Servant's second ability even if doing so would cause Water Servant's power to be less than 0.
No other card is named in this ruling.