Official Rulings
After I play Waking Nightmare (MM 017), if more Dis creatures then enter or leave play, will my opponent’s key cost change, or is it locked in when I played Waking Nightmare?
The key cost will change. This is a lasting effect that will update every time the board state changes.
Source: Rulebook
After I play Waking Nightmare (MM 017), if more Dis creatures then enter or leave play, will my opponent’s key cost change, or is it locked in when I played Waking Nightmare?
The key cost will change. This is a lasting effect that will update every time the board state changes.
Source: Rulebook
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