Luminescent Rain — ruling 1

Note that this spell counts the number of permanents you control of the chosen type, not just the number of creatures you control. It will also take your kindred permanents of the chosen type into account.

Luminescent Rain : règles, fonctionnement et interactions (MTG)

Luminescent Rain 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

Choose a creature type. You gain 2 life for each permanent you control of that type.

How it works : Luminescent Rain

Original English text — Wizards of the Coast / Scryfall

#1April 1, 2008· Wizards of the Coast
Note that this spell counts the number of permanents you control of the chosen type, not just the number of creatures you control. It will also take your kindred permanents of the chosen type into account.
No other card is named in this ruling.