Pure Melffy

Overall strategy.

Melffy's all share the effect:

"if your opponent Normal or Special Summons a monster(s) (except during the Damage Step), or if an opponent's monster targets this card for an attack"

Then they summon a mellfy or add one to your hand. Where after they return to the hand this provides a nice defence but each melffy may only use each effect once witch means some times you will have to rely on cards like rainbow life / mirror force - ish cards

additionally you get to SS all melffy's from your hand at the end of the turn (one of each kind).

So the overall strategy is to lay out your protection then SS as many as possible with spells to summon Joyous Melffys who can attack directly if you detach a card witch allows you to poke for 2000-4000 a turn then on you opponent's turn they can summon Melffys equal to there remaining matirals to set up protection again. And repeat...

Note:

This deck is still Meta and doesn't even has any hand traps.