Hi, 
But before that, I just would like to say while some items were easier to find, others were a little bit more difficult (for example: the santa hat haha!)... However, the work is 100% done!
So, take a look at what I found out there:
- Find a Santa hat.
Creating a simple Pixel Art Goblin Sorcerer
- Find a 1980's video game character.
With this post, 
My first console gaming expereince - Contra made me crazy
- Find a set of wings that are NOT on a bird. ( A single wing will also qualify.)
A nice message with a moral is what 
BEASTLY TALES - FLIGHT OF FANCY
- Find a cannon.
OpenRA - The classical Red Alert game
- Find a potato. (In any form.)
In this contest (promoted by 
Food Fight Friday - Round 43 🧁 🥊 🥬 🥊 🥂 05-17-19
- Find a vampire.
An RPG game (which seems to have a lot of fun for those who like the game genre) was featured in this post written by 
- Find a fire.
In this contest (promoted by 
Contest Kings Verified - 23rd May 2019
- Find a robot.
How about this robot that does an educational job through collection for recycling? Very nice, 
RoCycle - The Recycling Robot by MIT
- Find a famous building.
A little walk in the Egyptian desert
- Find a poisonous creature.
UK, France and an octopus in between. Does it look like fun? Well, 
Funny octopus at the border between UK and France.
- *BONUS ITEM: Find a fictional story that mentions at least two (2) of the above items in the list.
Items found: Wings / Famous Building (Palace).
Note: The name of the palace wasn't mentioned, but considering the theme of history (and the details of the place), was certainly a famous building.
Well... That is all, folks! I hope all items are valid because the hunt was very fun!
See ya!