Collector boosters - packs of 15 random cards including 4-5 guaranteed Rares and Mythic Rares, plus special art cards
Reanimating this with a Trash for Treasure or Refurbish (or the aforementioned Greasefang) is the quickest way to get it up and running, but honestly, playing it late game as a finisher is just great too
If you choose to sacrifice another creature, a second triggered ability (called a "reflexive" triggered ability) goes on the stack and you choose a target nonland permanent at that time
Cards like Mentor's Guidance or Plumb the Forbidden are very powerful with magecraft, giving you a bunch of triggers for very little work
The most recent list is Nahiri 2: The Reckoning
Red getting Impulse draw, often tied to combat damage, is nothing new in MTG at this point