Kynaios and Tiro of Meletis — ruling 1

Starting with you and proceeding in turn order, each player chooses a land card from their hand or chooses not to choose one, but doesn’t reveal any chosen lands yet. Once all players have made this choice, all chosen lands are revealed and enter the battlefield simultaneously.

Kynaios and Tiro of Meletis — ruling 2

If the card you draw is a land card, you may choose it to put onto the battlefield.

Kynaios and Tiro of Meletis : règles, fonctionnement et interactions (MTG)

Kynaios and Tiro of Meletis 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

At the beginning of your end step, draw a card. Each player may put a land card from their hand onto the battlefield, then each opponent who didn't draws a card.

How it works : Kynaios and Tiro of Meletis

Original English text — Wizards of the Coast / Scryfall

#1November 8, 2016· Wizards of the Coast
Starting with you and proceeding in turn order, each player chooses a land card from their hand or chooses not to choose one, but doesn’t reveal any chosen lands yet. Once all players have made this choice, all chosen lands are revealed and enter the battlefield simultaneously.
No other card is named in this ruling.
#2November 8, 2016· Wizards of the Coast
If the card you draw is a land card, you may choose it to put onto the battlefield.
No other card is named in this ruling.