Restless Bivouac — ruling 1

Counters on Restless Bivouac remain on it when it stops being a creature. If it becomes a creature later, they'll apply to it.

Restless Bivouac — ruling 2

If this becomes a creature because of an effect other than its own ability, its last ability will still trigger whenever it attacks.

Restless Bivouac — ruling 3

If this becomes a creature but you haven't controlled it continuously since your most recent turn began, you won't be able to activate its mana ability or attack with it that turn.

Restless Bivouac : règles, fonctionnement et interactions (MTG)

Restless Bivouac 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

This land enters tapped. : Add or . : This land becomes a 2/2 red and white Ox creature until end of turn. It's still a land. Whenever this land attacks, put a +1/+1 counter on target creature you control.

How it works : Restless Bivouac

Original English text — Wizards of the Coast / Scryfall

#1September 1, 2023· Wizards of the Coast
Counters on Restless Bivouac remain on it when it stops being a creature. If it becomes a creature later, they'll apply to it.
No other card is named in this ruling.
#2September 1, 2023· Wizards of the Coast
If this becomes a creature because of an effect other than its own ability, its last ability will still trigger whenever it attacks.
No other card is named in this ruling.
#3September 1, 2023· Wizards of the Coast
If this becomes a creature but you haven't controlled it continuously since your most recent turn began, you won't be able to activate its mana ability or attack with it that turn.
No other card is named in this ruling.