Rootweaver Druid — ruling 1

When the triggered ability resolves, first the next opponent in turn order (or, if it's an opponent's turn, the opponent whose turn it is) decides whether or not to search their library and puts the land cards onto the battlefield as instructed. Each opponent will know what players before them did when deciding what they are going to do. Then each player who searched their library shuffles it.

Rootweaver Druid — ruling 2

Each opponent who searches their library may find between zero and three basic land cards. If they find only one, they put it onto the battlefield tapped under your control.

Rootweaver Druid : règles, fonctionnement et interactions (MTG)

Rootweaver Druid 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, each opponent may search their library for up to three basic land cards. They each put one of those cards onto the battlefield tapped under your control and the rest onto the battlefield tapped under their control. Then each player who searched their library this way shuffles.

How it works : Rootweaver Druid

Original English text — Wizards of the Coast / Scryfall

#1November 10, 2020· Wizards of the Coast
When the triggered ability resolves, first the next opponent in turn order (or, if it's an opponent's turn, the opponent whose turn it is) decides whether or not to search their library and puts the land cards onto the battlefield as instructed. Each opponent will know what players before them did when deciding what they are going to do. Then each player who searched their library shuffles it.
No other card is named in this ruling.
#2November 10, 2020· Wizards of the Coast
Each opponent who searches their library may find between zero and three basic land cards. If they find only one, they put it onto the battlefield tapped under your control.
No other card is named in this ruling.