The Greedy Emissary event ends tomorrow, June 14th at 10 a.m. Pacific Time, meaning players have a little over one day to obtain the final rewards from the event.
A Greedy Emissary Diablo IV Crossover Event Guide
Players looking to obtain last minute rewards can use the WeakAuras made for the event, which shows when the next goblin will spawn. Here is the EU Weak Aura and NA Weak Aura to track their upcoming spawn locations.