Secondary spells as experimental feature

[wlinna]

Some spells could have alternative effect that is related to primary spell.

Primary and secondary spells share cooldown. If secondary spell is casted, you can't cast primary of same spell until cooldown is over.

For example, Ember Mage's could have secondary M2-spell that increases damage per Brimstone stack instead of increasing incapacitate time.

Secondary spell feature brings variety to heroes and makes balancing easier because heroes can be designed around primary spells and if hero has too big weakness, it could be adressed by adding secondary spell. Secondary spell's don't allow heroes to make bigger combos because of shared cooldown with primary spell.

[wlinna]

Implemented system and one spell in commit: b5f77f98c49ad58390bb88df6acf84a6d329dbef Added secondary to Rock Golem: dd718b5b593e002fdc80a156ba180f58197a54ff Added secondary to Elite Soldier: afbb2cc907c211b5507ec5ba0d24e9ac33e024ce Added secondary to Venator: 1e109829f73281b998f90f4b72910abf8ebd2c5e

More secondary spells will be added later but this issue is now considered closed