Then go and try yourself in the trainer. Still, with your deck I'd say that this would be quite hard - Ferox has tendency to spam Life creatures fast and get massive amount of healing from Feral Bonds.
you're a bit too kind
I would say absolutely impossible
Nah, you could do it easily if Ferox never drew any shields, bonds, dragons, frogs or cockatrices (leaving 12 leaf dragons, 12 RoLs, 2 epinephrine, 34 towers and 2 staves). It's a 1 in a billion chance of getting such a draw (literally) if the game only lasts 10 rounds (which, let's face it, is a higher level of damage than this deck can manage), but it isn't impossible.
On topic, I don't know of any decks that are at all similar to yours that can kill FGs. There are decks that are completely different that can do it very easily. An aflatoxin mutation deck with a lot of steals can destroy Ferox. But mono life? Nah.