Loreseeker's Stone — ruling 1

Use the number of cards in your hand at the time you activate the ability (before drawing three cards) to determine how much mana to add to the activation cost.

Loreseeker's Stone : règles, fonctionnement et interactions (MTG)

Loreseeker's Stone 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

, : Draw three cards. This ability costs more to activate for each card in your hand.

How it works : Loreseeker's Stone

Original English text — Wizards of the Coast / Scryfall

#1November 10, 2020· Wizards of the Coast
Use the number of cards in your hand at the time you activate the ability (before drawing three cards) to determine how much mana to add to the activation cost.
No other card is named in this ruling.