Hp: 3000
Attack: 68
Range: 12
Speed: 7
Population: 3
Shown below are a few combinations to get the 2-Head Frostfire Dragon.
gamera mech + siege striker
electric dragon + red mercury dragon
spartan warrior mech + red mercury dragon
laser blade mech + dual blade mech
gamera mech + spartan warrior mech
Double Cannon Mech + Avenger Mech ( np 1st time )
Dark Ether Messiah + Red Mercury Dragon
Fire Godzilla Mech + Red Dragon
massive gunner mech + archanid mech
Siege Striker+Spartan Warrior Mech
red mercury dragon + red mercury dragon (takes a few tries)