That “Stordito” variable should do the work; the following is the AI (at the beginning of the bp there is an Event tick): when “stordito” is true, the “simple move to” node is delayed for three seconds, so enemies don’t move during that time. Stordito is set as True in the shockwave bluprint, after the ForEachLoop (so every enemy affected should be stunned).
Sorry for the swap, I must have misanderstood the “Cross the X , y over” (my english…), but the result doesn’t change.