The slime looked at both Theo. Normally, the clone would be using all his power in order to inflict the most damage, while the real Theo conserved his energy so that he could replenish his clone's energy later.
That was what the slime would do if he was Theo.
However, Theo was different. Both the real body and the clone tried their best to kill the slime in front of them without caring about their energy reserve. This way, it was impossible to find the real Theo among the two.
However, what the slime didn't know was that Theo was extremely vigilant about the slime's ability.
After all, the slime had just dissolved the original Theo. Considering the slime could produce other humans or monsters with someone's original power, the slime might do the same thing in order to stop Theo from getting the advantage.