Basalt Ravager — ruling 1

The amount of damage dealt is calculated as the triggered ability resolves based on the creatures you control at that time, including Basalt Ravager itself if it’s still under your control. You’ll always use the greatest number possible. You don’t need to choose any creature types. For example, if you control a Giant Wizard, a Giant Warrior, an Elf Warrior, and a Kor Warrior at that time, Basalt Ravager will deal 3 damage.

Basalt Ravager : règles, fonctionnement et interactions (MTG)

Basalt Ravager 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, it deals X damage to any target, where X is the greatest number of creatures you control that have a creature type in common.

How it works : Basalt Ravager

Original English text — Wizards of the Coast / Scryfall

#1February 5, 2021· Wizards of the Coast
The amount of damage dealt is calculated as the triggered ability resolves based on the creatures you control at that time, including Basalt Ravager itself if it’s still under your control. You’ll always use the greatest number possible. You don’t need to choose any creature types. For example, if you control a Giant Wizard, a Giant Warrior, an Elf Warrior, and a Kor Warrior at that time, Basalt Ravager will deal 3 damage.
No other card is named in this ruling.