Restless Ridgeline
Land
This land enters tapped.
: Add 
or 
.
: This land becomes a 3/4 red and green Dinosaur creature until end of turn. It's still a land.
Whenever this land attacks, another target attacking creature gets +2/+0 until end of turn. Untap that creature.
Álvaro Calvo Escudero
Rulings
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.
(wotc • 2023-11-10)
If this becomes a creature because of an effect other than its own ability, its last ability will still trigger whenever it attacks.
(wotc • 2023-11-10)
Rulings
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.
(wotc • 2023-11-10)
If this becomes a creature because of an effect other than its own ability, its last ability will still trigger whenever it attacks.
(wotc • 2023-11-10)