Saoirse (Cleric) Is a free to play hero and the second you will aquire.
Gold Attributes:
Hero DEF up by 30%
Hero HP up by 30%
Harvesting Speed of all resources 25%
Resource Production up by 50%
Hero Skin Bonus:
Increase lab deposit by 1000
Collecting Hero Shards:
Sweeping Elite 2-1 in Campaign
Sweeping Elite 3-2 in Campaign
Sweeping Elite 5-2 in Campaign
From quests
From Vanguard Chest
Collecting Skin Shards:
You need to acquire them trough the mall or coupon events.
Note: Saorise is a really good hero for arena, she keeps your heroes alive
and deals a good amount of damage if stacked with attack runes.