Dragon Annihilation

These dragons from hell, under the witch's spell, are going to destroy the village you dwell! The only way to repel, is to show them the power of your shell!

1.Build turrets to destroy waves of incoming dragons.
2.Combine two identical turrets to create a stronger unit (turret fusion).
3.Drag and position turrets anywhere on the grid.
4.Each dragon eliminated rewards gold to reinvest in defences.