An overpowered stun gun, a British passport, and a lockpick.
To break out of the jail, I stunkill a prison guard or two, torturing them if necessary to obtain the passcode. Then I scour the internet to find one of my old crushes, and take a taxi to their house. Then I stun him or her and sexy time occurs. After that, I go to the airport, and search for lone travellers who are going to Rome. I tell them I have a gun pointing through my coat pocket "just like in the movies", and they should quietly come into the toilet with me. I then lethally stun and gag them, take their tickets and some of their money, lock the cubicle from the inside, then jump over. Then I buy some laxatives and spare batteries, and catch my flight to Rome. Once I get there, I find a pharmacy and pick through the back door, steal some MAOIs and Benzos, and take a taxi to the Vatican. I find some way to lethally stun a cardinal and take his robes. After that, I spike the pope's food with the drugs, the adverse reaction will prove deadly. I don't stick around to find out. Instead I buy some face-darkener and pork chops, and go to Mecca in a similar manner to the way I described, except coaxing people into the toilet trap with laxatives this time. I sneak into the kaaba and desecrate it with pork chops. Following that, I take a plane to Jerusalem, using a skullcap to appear Jewish this time. I desecrate the Temple Mount with pork chops too. Then I watch the news for the reactions. "Atheist terrorist kills pope, desecrates holy sites"
I have nothing against religions nor am I an Atheist, that was just a bit of fun.