I got this mark during the Halloween global.
Rewards were a large pumpkin and a jack o'lantern - no PP or QP.
The mark disappeared when I logged off.
Give a bag of candycorn (global item) to a young druid (global mob) to get the mark.
The item was a random pop and it looked like this: "A small canvas bag filled with candycorn, tied with an orange ribbon.".
The druid is the mob who gives the global rewards, and looks like this: "A young druid patrols the area here, seeking out items of the damned".
Log:
(Mount: 2542st) [*]<871hp 805sp 900st> A young druid's stomach growls loudly as if they are hungry. [...] (Mount: 2529st) [*]<1481hp 805sp 1419st> 'Mmmm I love candy corn it is my favorite.' a young druid says. [...] (Mount: 2540st) [*]<1481hp 805sp 1427st> vis You fade back into sight. You are now visible to the naked eye again. (Mount: 2540st) <1481hp 805sp 1427st> give bag druid You give a bag of candycorn to a young druid. You have been granted the Mark of Treats! 'How did you know that was my favorite candy, thank you it has been a long day!' a young druid exclaims. A young druid gives you a large pumpkin. A young druid gives you a jack o'lantern. For giving a tasty treat to a hard working druid during their time of need the powers have granted you a mark.
Log from 2011:
give candycorn druid You give a bag of candycorn to a young druid. You have been granted the Mark of Treats! A young druid exclaims, 'How did you know that was my favorite candy, thank you it has been a long day!' A young druid gives you a large pumpkin. A young druid gives you a jack o'lantern. For giving a tasty treat to a hard working druid during their time of need the powers have granted you a mark. A young druid drops a gnomish miner's bag. A young druid drops a large pumpkin. A young druid drops a small white candle. A young druid drops a carving knife.