Your objective is simple: Soul Accumulation
Your motive is a little bit more complex: Love (Yes, it works)
Stage One:
To begin your plan, you must first Assassinate a Town Mascot. This will cause the world to sit up and take notice, stunned by your arrival. Who is this Despoiler of all that is Good and Nice and True? Where did they come from? And why do they look so good wearing the skin of another human?
Stage Two:
Next, you will Contaminate/poison the Moon (ooh, tides!). This will cause countless hordes of Cultists to flock to you, begging to do your every bidding. Your name will become synonymous with Sheer dementedness, as lesser men whisper your name in terror.
Stage Three:
Finally, you will Unleash your Great Supernatural Forces, bringing about the Return of the Antichrist. This will all be done from a Island of Mu, an excellent choice if we might say. These three deeds will herald the end, and the citizens of this planet will have no choice but to elect you their new god.
Trust us, it'll all come together in the end.