Hmm. Life and death is a tricky duo to use since there really isn't that much synergy between the two elements. You should go with what ralouf posted. Poisons and arsenic are extremely cheap, so they can be run off a mark. Mitosis is quite slow in your rush deck, so remove it. emptathetic bond and the shard are also healing cards and don't fit in a rush deck. Personally, I would go for more horned frogs than scorpions, but it's really up to you. Adrenalin'd scorpions do 4 damage per turn and add 2 poison each turn, while adrenalin'd frogs do 12 damage per turn.