Griffins and Royal Griffins are the level 3 creatures of Castle. They can be recruited from the Griffin Tower.
"Griffins roost in special towers built for them on the castle grounds. Standard griffins are able to counterstrike against two attackers per turn. Royal griffins can counterstrike an unlimited number of attackers." RoE manual
Building the Griffin Bastion increases griffins' growth by 3 per week.
Heroes with a specialty
Edric the Knight has griffins as a specialty, which increases the attack and defense skills of any griffins for each level attained after 3rd level, and gives them a speed bonus of 1.
See also: