What is a ursa
Ursine Rabid Soldier for Assaults
Last unit you can get in barracks, they melee attackers with no building preference and high HP and ATK. Personally, I dont think they are that useful not to mention theyre expensive. A Lvl 1 URSA costs 30k potion each, upgrading them to Lvl 2 in the Lab takes 3 million potion and 10 days.
In my opinion, a couple Minotaurs for meat shields and 15 Warriors for attack is a far more effective and less expensive way to go.