Apparently ever since the changes to 735 on 4/1 ensorcell didn't use any energy. Well that's not entirely accurate, you still lost energy, but the spell didn't check to see if you had enough energy before allowing you to cast it, making it so you could effectively cast the spell as many times as you wanted but making you go into negative energy.

I just happened to notice it today when I brought my T0 weapon up to T5 and that didn't sound right at all, my sorc had like -300k energy.

I wonder if someone out there noticed this and has like -10 million energy because they were ensorcelling everything.