Frost oni march the snow trail toward your hot spring. Steam vents drift shifting walls across the valley — towers cannot shoot through steam. click a steam cloud over the ravine and your snowmen pack it into an ice road; finish a road and the bathing yetis storm across it and flank the oni column. Keep the pool hot with lanterns or the yetis stay in the water. 1/2/3 pick tower · click tower to upgrade · SPACE call the next wave early for bonus ¤.