That sounds innocent enough, right
While a Level 8 Fusion Monster is in your GY, this card gains 200 ATK for each monster in your GY, also your opponent cannot target other monsters you control with card effects
The "attack all monsters" thing is fine, and more/less your OTK enabler.
Lower Text [Opponent's Turn] While you have a yellow Digimon in play, all of your Digimon with [Angel], [Archangel], or [Fallen Angel] in their traits gain Retaliation
Once summoned, it allows players to search a Pendulum monster with 2500 ATK from the deck
mirror coat unit Mirrorcoat Unit (unofficial translation name) Mirrorcoat Unit (unofficial translation name) Can only be equipped on Drone monsters