I’m sorry for the confusion, try connecting the vertices in this order: 714, 716, 561, 564. This should cast a pretty powerful spell
Are you connecting the vertices by clicking them or holding them down? I've updated the comment with the attacks and a little tutorial. Also, it’s quite common to not finish the spell completely, which means you might have to redraw 2 or 3 times out of 56.To be honest, the game is a bit buggy and unbalanced right now, but it is what it is