Crab Pearl

A blue, glowing orb the size of Lash's palm, given to her by the
Crab Wizard (the enormous-hatted wizard crab of Port Quaybay's docks) as
her reward for slaying "the great evil." It is the party's means of summoning him
"in their time of greatest need" — he's magic, so presumably he can teleport.
The wizard once made it grow an inch (he can do that).

Session 5

• Kain, told by the Crab Wizard that the pearl went to "the littlest one — she
  had murder in her eyes," tracked Lash down to confirm the party actually holds it.
  She polishes it at dockside tables.