At what time does a continuous effect created by the resolution of a spell or ability receive its timestamp?

A continuous effect created by the resolution of a spell or ability receives its timestamp at the time it’s created. This is important because the timestamp determines the order in which effects are applied in situations where multiple continuous effects might interact or overlap.

When a spell or ability resolves and generates a continuous effect, that effect is considered to be "created" at that moment. The game keeps track of when effects start to be in play by assigning them a timestamp, which is crucial for determining which effects take precedence under certain circumstances, such as when two effects would otherwise contradict each other.

Thus, the correct choice highlights the moment when the continuous effect enters the game, establishing its basis for interaction with potential future effects or changes on the battlefield.