Random Summoner Creature Running Around

There should be a random Jackalope-type creature running around the game. If you can catch em/kill em, you get to select the item you want. The next time you catch em/kill em, that item is yours for free. Or 10 farm added to your stats for the 1st kill, 20 for the next, 30, and so on... And the critter gets harder and harder to find and chase after. >>=)