An idea that needs some testing. The strategy is simple;
1. Keep your opponent distracted with your Stealth and Secret cards.
2. Draw cards by utilising cards like Skyvateer, Dirty Tricks and Greyheart Sage
3. Play Anka, the Buried to reduce the cost of the Deathrattle minions in your hand including Teron Gorefiend.
4. Dump all 1/1 Deathrattle minions to board and then Teron Gorefiend to activate them
5. You can also Backstab Teron Gorefiend if you will.
Constructive criticism is always welcome. Please feel free to share your thoughts.