'SLOT'
Syntax: slot <shard> <druidic staff>
The 
SLOT command is used by druids to insert crystals into their
druidic staffs.  Up to three crystals can be slotted into the staff.  Once
inserted, the crystal will provide a bonus which depends on the level of the
crystal.  Crystals level can be increased by combining shards.  Slotting
crystals is essential to power the staff's ability to store elemental magic.