Lifeblood Hydra — ruling 1

Use Lifeblood Hydra's power when it died (including any +1/+1 counters it had) to determine how much life to gain and how many cards to draw.

Lifeblood Hydra : règles, fonctionnement et interactions (MTG)

Lifeblood Hydra 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

Trample This creature enters with X +1/+1 counters on it. When this creature dies, you gain life and draw cards equal to its power.

How it works : Lifeblood Hydra

Original English text — Wizards of the Coast / Scryfall

#1November 7, 2014· Wizards of the Coast
Use Lifeblood Hydra's power when it died (including any +1/+1 counters it had) to determine how much life to gain and how many cards to draw.
No other card is named in this ruling.