Horn of Baldagyr
This horn is crafted from the scales of Baldagyr, an astral dragon sworn to watch over the resting place of a mighty primordial until the end of time.
Wondrous Item 325,000 gp
Power Daily (No Action)
Trigger: You roll initiative at the beginning of an encounter.
Effect: You and each ally within 10 squares of you gain a +5 item bonus to initiative checks and a +2 power bonus to attack rolls on his or her first turn during the encounter.
Published in Player's Handbook 2, page(s) 211.