Moltem
He should make SCP weapons summon from other universe but with drawbacks like Lightsaber but makes user use dark side. Tony star nano armor include hulk buster drawback must replace a heart. God of war kratos two swords drawback user must use pure rage to use the weapon. Destiny Thorn gun can kill almost anything till Euclid class drawback use user lifespand stronger scp more lifespand needed. Doom BFG 9000 can blow up Keter class scp drawback user blow up from recoil. And he should summon most annoying robot in all universe KVN from Final Space. And i know some weapons are op but it example.