Seven Kingdoms: Seowyn's Crossing
Those cultures who revere the Primal Spirits sometimes produce powerful warriors who form a strong bond with the spirit world. These primally empowered warriors develop a Druid-like ability to alter their shapes into powerful guardian forms, enabling them to better protect their allies and tribes. These warriors are referred to as Wardens.
Wardens are powerful fighters. Their connections to the spirit world protect them from blows despite their use of lighter armors. They’re also able to use their connection to the natural world to slow and bedevil their enemies, and the strength of their arms to batter those who would threaten them.