This is definetly one of the better final dungeons in the series though I'll admit that Lunar Core and Memoria hold very fond memories for me. I might be a minority for saying this but I actually enjoyed the final dungeon in VIII. Having your abilities sealed and having to fight to get them back... maybe it's just me.
VI holds a fond memory since you got to use most of your party and I liked the puzzle aspect of the dungeon (I really love the Dragon's Den btw

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