The Day's Rising
The Antlered Crown #139 (x3)

Attach to a hero with sentinel.

Response: After attached hero defends against an attack and takes no damage while defending that attack, exhaust The Day’s Rising to add 1 resource to the attached hero's resource pool.

Out of doubt, out of dark to the day's rising
I came singing in the sun, sword unsheathing.
–Éomer, The Return of the King