Elu (Battle Shaman) is a paid to play hero which requires you to make a purchase.
Gold Attributes:
Hero HP up by 30%
Increase Craft Studio Production by 10%
Increase Cavalry HP by 50%
Increase Cavalry ATK by 30%
Collecting Shards:
You need to purchase multiple packs to upgrade this hero.
Note: Elu is a very handy Cavalry focused hero for those type of
players who use Cavalry set ups to attack.