Make him a pay to unlock hero.

But...

Make him a seven star hero. (200 fragments for six and 500 for seven)
Can be unlocked when you get fragments for five stars,
Give him a Super Epic Skin (1000 fragments)
Mighty Legendary Skill (120 fragments and fragments are only available on a special stage only open on the 31th of the month.)
Skill increase arenít paid with gold but with gems.
Summoner has a one hour cool down to use unless you pay gems. (This included if Summoner is used in area defense as well.)

The ultimate UCool hero.