Bowser Jr's Descendant

So, while trying to write two other stories, I got the idea to start another story...shit...
          	
          	Welp, might as well go with a bang.
          	
          	The story I want to write is a SI of High School DxD. The character will have an original Sacred Gear. The question I'm asking is what would be more interesting to read about?
          	
          	Name: Siren's Support
          	Ability: boost ally abilities based on user's will and/or subject of the song user sings.
          	Drawback: the longer a fight goes, the more user risks rendering themselves mute and/or deaf.
          	
          	Name: Card Wizard
          	Ability: use cards to cast spells and summon familiars.
          	Drawback: Only one spell can be cast at a time, must be stationary when summoning creatures.
          	
          	Name: Fiction Fantasy
          	Ability: use any attack from any previously seen media (anime, video games, etc.)
          	Drawback: Any recoil still applies, only one franchise per fight, prolonged usage results in vivid hallucinations.