Sword of Dungeons & Dragons
Oracle Text
Equipped creature gets +2/+2 and has protection from Rogues and from Clerics.
Whenever equipped creature deals combat damage to a player, create a 4/4 gold Dragon creature token with flying and roll a d20 (a twenty-sided die). If you roll a 20, repeat this process.
Equip
Looks like you can already find it on ebay. This is not my sale.
https://www.ebay.com/itm/1x-FOIL-Sword-of-Dungeons-and-Dragons-mtg-HasCon-Magic-exclusive-promo/182895898820?_trkparms=aid=222007&algo=SIM.MBE&ao=1&asc=20160908110712&meid=6b170a2d3f0644a9a81c7961577a970e&pid=100677&rk=3&rkt=30&sd=322861873636&_trksid=p2385738.c100677.m4598