You can't cast Emergency Weld without an artifact or creature card in your graveyard to target
Here's the thing: how fast you collect the set (how many drafts you need to do, which is proportional to how many gems you need to spend, since you can't "go infinite" with ranked drafts) depends MUCH more strongly on how many "new" Rares you collect each draft as opposed to how many games you win
A deck with a commander that costs three mana may play more 1mv ramp, despite its fragility, to facilitate playing its commander on turn two
Still, anyone who plays within the confines of Tales of Middle-Earth will get serious mileage out of Amass Orcs, overwhelming any Elf or Halfling deck that dares defy Sauron's will.
It's for Timetwister
This time I lightly badgered my girlfriend into joining me, and it was fun to see her transform from begrudging viewer to a bigger fan than me, to the point where she's now grabbed us tickets to see an orchestral performance of the soundtrack