This shows a way of earning EXP quickly in Shining Resonance Refrain.
The idea is to use an 'egg hunt' sigil for the bookmark in any dungeon to make egg mobs appear inside the dungeon. The 'Master Egg' mobs give a ton of EXP for beating them but make sure to grab at least 1 new 'egg hunt' sigil from one of the egg mobs. Those sigils can either be stolen or dropped. If you fail to get a new sigil consider reloading your save and trying again because they're not easy to come by.
The prerequisite is, of course, to have at least 1 'egg hunt' sigil. As you may have guessed, they can only be dropped or stolen from the egg mobs that spawn randomly in fights around the world. You need to have a little luck here...
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