Brave Kitten Knight

[Thomas★Zero]

This card can attack your opponent directly. While face-up on the field and you have 10 or more Fairy-Type monsters in your graveyard: This cards ATK and DEF become 3000. When this card leaves the field: send the top 2 cards of your deck to the graveyard.

[Trebuchet MS]

I don't ever recall seeing a Fairy-based Deck that can rapidly fill its Graveyard, though with how splashable a Lightsworn engine is, this doesn't look too hard to accomplish.

 

By the time this reaches 3k ATK, the Duel's been going on for a bit and both sides have taken damage. Landing a 3k direct attack out of nowhere with no warning beforehand has the potential to outright win the game on the spot, if not by the next turn if not answered immediately. This is a mild cause for concern.

[I Hate Snatch Steal]

Kitty ( :

 

On topic:

 

Gajiltron already covered most of this card's properties already but here goes.

 

Maybe use this card and this:

 

http://yugioh.wikia.com/wiki/Sephylon%2C_the_Ultimate_Timelord

 

in monster mash?

 

Also, I think LS have at least 1 Fairy-Type monster, maybe a few more that were never really used and thus I haven't heard of them.