Clever solution,although you may have miscounted cards in hand at start of turn 4. What actually happened was much simpler. Opponent played primal ooze. I played ravager opposite. Primal ooze ran to a new lane (after negating ravager kill friendly minion "special". I played molten golem opposite ooze, etc. I eventually wound up with 5 excellent units. I don't remember how AI avoided losing the game in this time -- it may have involved some trees of live or vitality power cards, but the AI didn't last long.
Lesson: be careful of playing primal ooze on open lanes if you opponent might have the following: molten golem, magma sphere, dragon fish, ravager, dream feeder. The balancing disadvantage of these creatures gets negated by the ooze special.