What type of trigger activates with the condition "Whenever you have no cards in hand"?

The scenario presented involves the phrase "Whenever you have no cards in hand," which describes a condition that automatically checks the state of the game rather than requiring a specific action or cost to trigger. This aligns with the definition of a state trigger, which activates based on specific game states or conditions.

State triggers check for a condition that exists at the time the trigger's condition is evaluated, and they automatically trigger whenever that condition is met. In this case, the condition of having no cards in hand will continuously monitor the player's state and trigger whenever the player reaches that state.

In contrast, a delayed trigger activates after a previous event has occurred, a continuous trigger would typically apply a constant effect as long as a condition is true, and an activated ability requires a player to pay costs and specify an action to use it. These aspects further clarify why the state trigger is the appropriate classification for this scenario.