Sir Balin is a King Arthur hero and requires 100,000 prestige to unlock.
Sir Balin is a gambit user. His gambit benefits from Gambit and Spell Attack. This means for maximum damage you want to equip him with a mount AND a staff as well as research gambit and spell attack. The magic damage portion bypasses entrench.
Sir Balin's unit type, Cataphract, reduces damage taken. Stats: Bravery - High; Tactics - High; Magic - Low
Spectral Blitz: This gambit hits his target and the targets 1 space to the left, right, and behind it.
It is said that it cannot be dodged as it employs spell damage and spell attacks cannot be dodged or blocked (Confirm or Deny this please).
He is a strong hero in general, however formations like Cluster really hurt his gambits potential.