The Problem At The Mets Game...

"Don't tell me there are more!!" Kevin groaned as another wave of pythons slithered towards the barrier. This attack has been happening for 12 hours. Everyone was getting tired, even the Ares children.
"I'm afraid so," Chiron muttered. "You think you could unleash another wave of lightning?" he asked.
"I better be getting paid in a lot of food for this." Kevin muttered as a lot of lightning came out of his hands.
A dark wall then appeared next to Chiron. Chiron grabbed a crossbow and pointed the crossbow at it.
Autumn appeared out of it.
"Holy Fates!!!!" Kevin shouted."You are hereby unallowed to do that ever again. And I mean EVER!!"
"Sorry, wait where did Nico go?"
"Nico?" Chiron asked."Nico has not been in camp ever since the Seven had returned."
"But he was just here with me." Autumn said.
"So a camper is missing, that is great but seriously can we please focus on the snakes which are really scary and I could use a little help. Chiron; fire that crossbow. Autumn; the lake is over there. Power it up!"
An arrow killed one snake and about 100 snakes drowned. All of the snakes turned around and fled. Kevin collapsed onto the ground and started to mumble,"Never again, never again, never again."
"Come on, we should get you inside Kevin." Chiron said.
"None of you are going anywhere." Lily shouted.
Spiders started to pour in everywhere. They flooded towards the cabins and towards the Big House. All of the Athena children stared to run away but spiders stopped them from going anywhere.
"No where, any of you." Lily repeated.
She smiled an evil smile.

Notes

Where did Lily get the spiders and what are her plans for Camp Half-Blood?
@FandomYOLODarkness