1. Vorpal blade selected.
2. Keep pressing RIGHT TRIGGER.
3. Press once LEFT TRIGGER on the target you want to lock (the brazier you want to take fire from, i.e.).
4. Press again once LEFT TRIGGER, but on the second target (where you want the fire lit).
5. You can ONLY NOW release the RIGHT TRIGGER.
6. Vorpal blade will now transmit fire from one target to another.