Raids in Dark Summoner
Overview
Raids are special battle missions that occur after summoning a Dark Lord using a Dark Lord Crystal. If defeated, the Dark Lord will be added to your inventory as a usable monster. While you can Raid a Dark Lord mission as many times as you want, you should note that you will only receive a Dark Lord monster the first time you complete it, afterwards only receiving gold as a reward.
Gameplay
During a Raid, allies are crucial. Dark Lords have a large number of Hit Points (HP) and most players will be unable to defeat them without several allies to add to their strength. When attacking a Dark Lord during a Raid, you attack with the combined Attack Power of you and all of your allies, making strong allies very desirable. It is recommended that you have a couple of Energy Potions available before starting a Raid, as you will only have a few hours to complete it before it ends. Also note that Dark Lords rapidly increase in HP as you progress, meaning it is a good idea to keep an eye on whether your allies are keeping up in level and Attack Power, as weak allies can badly handicap you in later Dark Lord Raids.
How to Get Dark Lord Crystals
During some regular missions, you will find that the third (rarest) drop slot will sometimes give you a piece of Collectable Loot. There are six total pieces of Loot for each Dark Lord, and when all are collected, you may exchange them for the corresponding Dark Lord Crystal. You can then use said Crystal from the Raid screen to begin the Raid.