the wave spell is a spell that pushes bullets from cannons archer towers and anything hat trys to hit the troops that is inside the spell radius tiles is 4 cost 35,000 elixer for lvl 1
lvl 2 cost 37,000 1 hour to make
maxed is lvl 2 andyou have to have spell factory lvl 4 lab lvl 8 for upgrading the wave spell
