There's No Way of Blocking the Attack!

Duel Puzzle Information
The field has Monsters with less than 1000 attack points!! But you notice they have effects.

.

Duel States
Your Life Points:- 500

Your Opponent's Life Points:- 1900

Your Cards
Hand:-

King of Yamimakai

Leghul

Shadow Specter

Kattapillar

Shadow Specter

Skull Servant

Field:-

Mystic Lamp (Attack Position) Ooguchi (Attack Position) Jinzo 7 (Attack Position) Rainbow Flower (Attack Position)

Your Opponent's Cards
Field:-

Mystical Elf (Defense Position)

Steps
1) Play Leghul in Attack Position.

2) Enter Battle Phase.

3) Attack with everyone. Since they all have the effect of doing direct damage, that Mystical Elf won't be a problem. You will win the duel.