Fully leveled hero stuck at 7 special skill

[zephyr1]

@pinkymadigan

the % for each feeder is multiplied by 10 now,

5, but yes, much easier

@zephyr1

A 2* matched-color normally gives a 4% chance. Quintupling (times 5) is 20. So five 2* feeders together would guarantee the skill would level up.