When one of your opponents monsters declares a direct attack on your life points, you can Special Summon this card from your hand and immediately end their Battle Phase
The card itself is fine as far as i'm concerned, let me help you withe the wording instead
CORI-JP046 Chaos Silk Hat (Chaos Hats) Quick-Play Spell (1) When your opponent activates a Normal Spell/Trap Card, or monster effect: Choose 3 Spells/Traps with different names from each other from your Deck and 1 monster in your Main Monster Zone that mentions Ritual of Light and Darkness, and if you do, Special Summon the chosen Spells/Traps as Normal Monsters (Spellcaster/DARK/Level 8/ATK 0/DEF 0) whose name is Chaos Hats in face-down Defense Position, Set the chosen monster, and shuffle them on the field, then your opponents activated effect becomes destroy 1 opponents Set monster
Master the forbidden Fusion arts that combine fierce Dragon and Machine monsters with Structure Deck: Cyber Strike Display Box from Konami
A single Cyber Dragon Infinity lock can shut your opponent out, while Chimeratech Rampage Dragon clears the board and swings in for the game
This works perfectly with Fluffal Wings to generate even more advantage