Came across this while mucking about with a Fallen Druid deck and playing against Gemini. Each time you Twin Universe a mutation, it gets an increase in stats (similar to hitting it with Chaos Power). Quite the bonus.
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61p 61p 61p 61p 6u2 6u2 6u2 6u2 6u2 6u2 6u4 6u4 6u4 6u4 808 808 808 80b 80b 80b 80b 80b 80b 81q 81q 81q 81q 81q 81q 81q 8pj
You play a spark and hit it with Improved Mutation on the same turn. If you have enough quantum, add a Chaos Power or two, then Twin Universe to your heart's content. To get the full effect, make sure you are applying TU to the latest mutation (the strongest one). You get some amazingly powerful creatures in short order. Obviously, the idea is to rush with damage. A chain of Dimensional Shields is the stopper against this deck, unles the mutation gains momentum.
Interesting observation having played with it a bit, now; lobotomizer removes the mutation characteristic and further TU will not result in an increase in stats.