Levels

Lv	Cooldown	Cost	HP Buff
1	05:37:40	34,330 2,450	7500
	HP Buff: 7500
2	07:30:20	45,770 3,200	12000
	HP Buff: 12000
3	09:22:50	57,220 3,950	17250
	HP Buff: 17250
4	11:15:30	68,660 4,690	22500
	HP Buff: 22500
5	13:08:00	80,100 5,440	30000
	HP Buff: 30000

Required

Upgrade and unlock the following tech to research

Lv	Tech
1	Heavenfire: 2
4	Heavenfire: 3