What is the strongest yugioh card?

Limited Edition Exodia --> All 5 pieces of it:

The Left Arm Of The Forbidden One

The Right Arm The Forbidden One

The Left Leg The Forbidden One

The Right Leg The Forbidden One

And The Last Piece:

Exodia The Forbidden One (which is the Head)

the strongest card is the wicked avatar exodia is 5 cards not 1