Summon:

Learn how to summon demons from your Stock in Shin Megami Tensei III: Nocturne HD Remaster via the battle menu. Summoning is free.

The Summon option is located on its own separate page within the battle menu. This allows you to summon any demons currently held in your Stock (your collection of demons).

If your active party (the demons currently fighting with you) already has three demons, you must first swap out one of them to make space for the demon you wish to summon.

Summoning demons in this manner costs nothing in terms of Macca (in-game currency) or any other resources, which is a change from earlier games in the series.