Bring 10 Wastewander Water Pouches to Chief Engineer Bilgewhizzle in Gadgetzan in exchange for another power source.
Let me guess - you didn't get whatever world-ending, nefarious deed you were doing done in time. No wait, better still... you dropped it in the sand! Well, whatever the reason, I do have additional power sources I will sell to you. This time, however, it will cost you ten, YES TEN Wastewander Water Pouches!
Times are tough all around, [player], and power sources don't grow on trees! Hrm, but what if they did. Maybe we could MAKE a power source tree...