Graveblade Marauder — ruling 1

Count the number of creature cards in your graveyard as the ability resolves to determine how much life is lost. Notably, this could include any other creature you owned that died in combat, and perhaps even Graveblade Marauder itself.

Graveblade Marauder : règles, fonctionnement et interactions (MTG)

Graveblade Marauder 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

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) Whenever this creature deals combat damage to a player, that player loses life equal to the number of creature cards in your graveyard.

How it works : Graveblade Marauder

Original English text — Wizards of the Coast / Scryfall

#1June 22, 2015· Wizards of the Coast
Count the number of creature cards in your graveyard as the ability resolves to determine how much life is lost. Notably, this could include any other creature you owned that died in combat, and perhaps even Graveblade Marauder itself.
No other card is named in this ruling.