In a 'Naruto Arachnid Summoner' fanfiction, an exciting plot could be that the main character is an outcast who accidentally summons a super - intelligent and powerful arachnid. This arachnid becomes their mentor and teaches them new and unique jutsus related to arachnid abilities. Together, they form a bond and set out to change the perception of arachnid summoners in the Naruto world. They face many battles where they use their combined skills to defeat opponents and prove that arachnid - based powers can be just as strong as other types of summonings.
One interesting plot could be a young ninja discovers they have the unique ability to summon arachnids in the Naruto universe. They start off being shunned for this strange power but then use it to their advantage in battles, like creating webs to trap enemies or having spider - like minions to gather intelligence.
Well, perhaps the plot could revolve around a character who is from a hidden clan with the arachnid summoning jutsu. This character could be on a quest to find a powerful ancient arachnid spirit that was lost long ago. Along the way, they face challenges from other ninja clans who fear the power of the arachnids and try to stop them. They also have to learn to control their summoning better as it has some wild and unpredictable aspects.