The Card Battle Eternal Destiny - Playthrough Part 21

Fully scouted the Mayohiga dungeon. Then I finished the last battle in the Goddess CPU mode on Easy. This unlocked the Level Cap Breaker battles for level 300 (which is a bit of an overkill) and Attribute Dungeons filled with enemies from a single affinity (Earth, Water, Fire, etc.). They are again divided into Easy, Normal and Hard difficulty. You don't have to have a deck filled with the required attribute, but it's beneficial to have some monsters with it since there are matching card slots which regenerate your HP and greatly increase your stats. I scouted the Earth Easy dungeon. Then I completed the Angel's Ladder scenario, which only had a single battle remaining. You drive off the Kells and restore balance by closing the gate to Heaven. Weirdly this rewards you with the 12 demons you faced in the previous scenario and unlocks the 12 Angels' Domain Dungeon, of which I completed the easy variant. This unlocked the Expert challenge, which functions the same way as the other two difficulties, but you have to complete an even tougher battle.