Over 100 duels, farmed lv 40 with zombie at 7000-8000 each time (not sure how many times I actually farmed the lv though). I have 17 lv 10 AD...17!!!! 8 XYZ UR and 20+ of every other card (lv5, lv7, despair, all of them). But, I got ZERO lancer lindwurm. I started today thinking this would be the day...wow...I am so upset I want to break something. I spent so much time....for nothing.
Yeah. But Luster Dragon doesn't have piercing, and it is exclusive to a not-so-great Mini Box. If you also mean Spear Dragon (lancer dragon??), it's a UR from a Mini Box not worth getting 3 copies of. There's also Red-eyes Wyvern, but he's expensive AF.