Every month, we need to summon 500 nat 3 to get a nat 5. I think it is too expensive that each nat 3 needed 10000 gold to summon from shards.
To get Gold, I recommend "play gear dungeon"I think 10,000 gold is not expensive. you can get gold very fast
10,000 gold is like chump change you just need to farm gold and not spend it wisely