Replace is an action in Legends of Runeterra.
When the allied bench is full, to play another unit or landmark, the player first is required to select one to be Replaced.
Replaced units or landmarks are considered Gone from combat, and effects targeting them will not Fizzle when they attempt to resolve if the target is still valid (eg. 3 Scorched Earth targeting a damaged unit would still resolve if it was replaced with a landmark, destroying it).
List of cards that have action Replace