Hmm. I can't see demonic poison being good. This is the translation i have.

Card Name: Demonic Poison
Card Type: Spell
Color: Dark
CastingCost: 1
Mana Value: 1
Effect: [Shield Trigger] Choose a creature in your battle zone and put it into the graveyard or you cannot use this spell. Choose a creature in your manazone and put it into your hand.


it says hand not into play. Or that would utterly insane.