Amaram stole the Shardblade, killed Kaladin's squad to keep the top secret from obtaining out, and bought him into slavery as a deserter. Shardblades are priceless magical swords, and Kaladin legally gained that Shardblade, but Amaram decided that a Shardblade would be squandered on a peasant with no schooling and must go to a noble like him who would save the planet.