13 while evildoers and impostors will go from bad to worse, deceiving and being deceived.

Read 2 Timothy 3:13 Using Other Translations

But evil men and seducers shall wax worse and worse, deceiving, and being deceived.
while evil people and impostors will go on from bad to worse, deceiving and being deceived.
But evil people and impostors will flourish. They will deceive others and will themselves be deceived.