Draconic Lore is at best four mana draw three spell, but you can get much better milage from the planeswalker Kiora we talked about earlier
It creates two 1/1 red Goblin tokens for every copy
Giving your vampire commander flying, deathtouch, and lifelink if it doesnt have them natively is huge, working in tandem with all the typal bonuses it might receive
While that might not seem such a big deal, this can mean a 6-drop ahead of schedule, a double spell turn that might not have otherwise been possible, a Genesis Hydra for one bigger X, etc
Its an interesting piece for any goblin tribal deck looking to tap into the discard and madness mechanics
If you currently have access to Arena just the act of logging in gets you three packs, and once again remember these packs have 1 rare/mythic, 2 uncommon and 5 commons and or a combination of wildcards