All Hail the Dark Lord, Or Something Idiotic Like That (смешанная)

Harry Potter had a plan...it wasn't a very good plan, but at least it was simple.
Step 1: Don't die from the insanely difficult ritual
Step 2: Cause as much chaos to the timeline as possible before getting killed and/or arrested
As it goes, it was really simple...until it became clear he wasn't traveling back in time alone. Now the whole plan has to change.
Step 1: Don't die from the ritual
Step 2: Kill off current Dark Lord
Step 3: Establish following to become new Dark Lord
Step 4: Overthrow Ministry
Step 5: Cause as much chaos to the timeline as possible
Step 6: Keep boyfriend alive and not mad at him
It was a work in progress, but plans hadn't worked out well for Harry in the past regardless. Oh well, it's not like he could make things worse...