You may convert
100x demonic essence into
1x condensed bottle by right clicking on them.
Most NPC's trade using bottles, for example:
SerafinLocated on middle floor of the Inquisition Tower, situated at Thais crossroads
,
DagomirLocated one floor above the Thais Temple
,
WobergLocated west of Thais Depot
..
Essence and bottles are used in the following places..
Inquisition Tower -
Serafin sells various character upgrading buffs for bottles.
Theodore buys creature products for essence.
Read more..
Temple -
Dagomir sells living stones for bottles.
Grizzly Adams buys creature products for essence.
Read more..
Blacksmith -
Dunkirr buys various pieces of equipment and weapons for bottles.
Sam buys commonly dropped items (e.g. royal helmet) for essence.
Read more..
Item Upgrading -
Woberg buys and sells item upgrading stones for bottles.
Read more..
Alchemy -
The alchemist brews flasks which grant temporary buffs for bottles.
Read more..