To solve

To solve is a special keyword ability that can be found on Cases. Cases were introduced in Murders at Karlov Manor.
==Description==
To solve — [condition]" means "At the beginning of your end step, if [condition] and this Case is not solved, it becomes solved. 
To solve a Case, its "to solve" condition must be true both as its controller's end step begins and as the "to solve" ability tries to resolve. "To solve" abilities will check for their condition twice: once when the ability would trigger, and once when it resolves. If the condition isn't true at the beginning of your end step, the ability won't trigger at all. If the condition isn't true when the ability resolves, the Case won't become solved.
==References==