Frieza

Frieza was the ruler of many planets til goku defeated him however articho a saiyan in hell broke out of hell and gave frieza and other evil people the power of the z fighters Frieza got the power of krillen and tien due to the sheer power he had he was able to go into a fifth form

Transformations
Ice Jin Form 1

Ice Jin Form 2

Ice Jin Form 3

Ice Jin Form 4

Ice Jin Form 5

Ice Jin Form 6 (Unmastered)

Fusions
Frieza + Cooler = Frigid