This is such an easy combo all you have todo is pick up both cards. Both of the cards are Bad Reaction Of Simochi, and an Snatch Steal

Bad Reaction Of Simochi- As long as this card remains face-up on the field, the effect of increasing your opponent's Life Points is negated and changed to inflict the same amount of points in Direct Damage to your opponent's Life Points. 

Snatch Steal-Take control of one of your opponent's face-up monsters. Your opponent gains 1000 Life Points at each of his/her Standby Phases.

You would play the Bad Reaction Of Simochi first then snatch steal your oppenents monster. Since they gain 1000 life points from Snatch Steal's effect, Bad Reaction's Effect would counter-act it and the result would be your oppenents life points going down. You would only need this effect 10 times maximum, or keep there monster for 10 turns.

Brandon Geidlinger
kutintopieces@hotmail.com
Max Hutton
maxhutton04@hotmail.com