As it gets darker, the party will notice three small lanterns approaching them from the nearby woods.
The party has attracted the attention of three pixies (Monster Manual page 253), but more importantly the bag of gumdrops has attracted their pet Pixie Dragon:
Pixie Dragon, tiny dragon, neutral good
Armor Class 18 Hit Points 12 (4d4 + 4) Speed 6 foot, fly 40 feet
STR 3 (-4) DEX 16 (+3) CON 15 (+2) INT 12 (+1) WIS 15 (+2) CHA 20 (+5)
Skills Arcana +2, Perception +1, Stealth +3
Senses darkvision 60 feet, passive perception 11
Languages Draconic, Sylvan
Challenge 1 (200 XP)
Superior Invisibility. As a bonus action, a pixie dragon can turn invisible until its concentration ends (s if concentrating on a spell).
Limited Telepathy. Using telepathy, a pixie dragon can communicate with any other pixie dragon or pixie within 60 feet.
Innate Spellcasting. 3/day: color spray
ACTIONS: Bite. Melee Weapon Attack: +5 to hit, reach 5 feet, one creature. Hit: 3 piercing damage.
Breath Weapon. (Recharge 3-4) The dragon exhales a cloud of small randomly colored sparks that is a 15 foot line that is 5 feet wide. Anybody caught in the cloud must make a DC 14 CON save or be unable to see anything but bright colored sparks for 2D4 rounds.`
A pixie dragon is about 3 feet long, a very tiny dragon. It’s leathery skin will be multicolored, with various colors merging and fading over its body and wings. As it flies a trail of colored sparks will follow it and small tinkling sounds will be heard.
A pixie dragon will usually be found near one or more pixies. The dragon will not usually take any aggressive actions unless one of its pixie friends is attacked. In most cases it will use its breath weapon on any group that is attacking itself or nearby pixies, after which it will use its invisibility and fly off, returning after its breath weapon recharges only if any pixies are still in danger.
Pixie dragons are attracted to sugar and candy, which they can smell up to 40 feet away, and will usually urge any pixies in the are to help it obtain candy.
One of the pixies will use dancing lights to produce the lanterns as a distraction, after which the pixie dragon will fly around inside the trees, hiding behind the leaves and branches but leaving a trail of sparks that people will see. Once most of the party seems distracted, one of the pixies will sneak in and grab the bag of gumdrops (untying it from a belt or pulling it out of a backpack as necessary. Characters will get a chance to detect these actions, but the first thing they are likely to notice is the bag being dragged off out of sight (a fire should provide some light, but characters will have trouble seeing in the dark after staring at the lights). As necessary, the other two pixies will mischievously cast spells to occupy and distract the party.
Once the pixie has gotten about 20 feet away from the party, they will open the bag and pop a green and yellow gumdrop into their mouth (a party member may get close enough to see this). The pixie will get a huge smile on their face, but almost instantly they will grab their stomach and fall over, groaning. They have eaten one of the gumdrops that provides a full meal for a normal humanoid, and will be stuffed and suffering from a huge stomach ache. The poor pixie will be unable to concentrate well enough to go invisible or cast any spells.
If the pixie appears to be threatened the pixie dragon and the other two pixies will attempt to defend them.
On the other hand, if the party is friendly about things (but insistent on getting the gumdrop bag back) the pixies and the dragon will be friendly as well, offering to trade a Keoghtom’s Ointment for more gumdrops (but no more Green and Yellow gumdrops!)
Before Bruce Springsteen clawed out chart success, Manfred Mann covered one of his songs and had a major hit on their own that might tell where some of the party members are headed: