Subrule · Chapter 6
cr:6.6.5c
A state-based triggered effect triggers if the game state did not initially meet the trigger condition, then changes and meets the trigger condition. If a state-based triggered effect is generated while the game state meets the trigger condition, the effect will trigger.
Example: Hyper Driver has the text “This enters the arena with a steam counter. When it has none, destroy it.” the latter of which is a state-based triggered effect. If a Hyper Driver enters the arena with no steam counters, the triggered effect is generated, the state-based condition is met, and the effect is triggered, destroying the Hyper Driver on resolution.