Alter Aeon Online Help

Keywords are:  'no_sacrifice nosacrifice keepflag keepsake flags noput no_put'

Items with a NO_SAC flag cannot be sacrificed, and usually cannot be used
by crafting skills.

Items with a KEEP flag cannot be given away, dropped, placed in objects
on the ground or donated. Please note that you can still drop containers
with KEEP flagged items inside.

Objects can be marked with a KEEP flag with 'set keep <object name>'.

To remove a KEEP flag from an object, use 'set unkeep <object name>'.

Items with a NO_PUT flag will not be put into containers when using
'put all <container>'.

To set or remove a NO_PUT flag from an object, use 'set noput <object name>'