Well, basically, you sac a monster(s) on the field for the high lvl in your hand. Then play last will and get labyrinth wall. This way, you want have to sac a monster for labyrinth wall. Labyrinth wall is great with a 3000 def. Can stall for some time but can easily be fissured. You can also use shield and sword to make it have 3000 attack. Hope this tip helped some of you guys.