Clawlord Kril'mandar may only be summoned on the island shown in the map above, and it is only reachable by flying mount. In order to summon the monster, the player must collect six clamshells - Akkalou's Clamshell, Akkalar's Clamshell, Kishak's Clamshell, Damlak's Clamshell, Clamstok's Clamshell, Odd'nirok's Clamshell - combine them into Clamshell Band, and proceed to use Clamshell Band (consumed upon use). All six clamshells are from elite makrura.
Clawlord Kril'mandar is notable because of the fist weapon, Lobstmourne, in his loot table. Please note that Lobstmourne is not 100% guaranteed as loot, is Bind on Pickup, and Unique! (But it does have a high drop rate.) For those considering solo-ing the monster, please note that Clawlord Kril'mandar will despawn if you drop out of combat and you will then have to re-create Clamshell Band. Better be confident about your ability to solo-kill him!
It's reminiscent of the effort to summon and defeat Terokk during The Burning Crusade... /nostalgia