Blood Artist 9.5/10 The other contender for being the best of the engine cards
What to buy first: Pre-made decks: Theme decks and battle decks come with a 60-card deck, coin, damage counters, paper playmat, and rules
Others prefer to experience the joy of discovery, opening packs in search of rare cards to complete their collections or bolster their competitive decks
Ulamog is less flexible than the construct, but it gives us much more potential in a longer game so a single copy is certainly justified
The other issue is that they require creatures to get the most from them and while you may well pack some creatures in your list you will not have a high enough density of them to be pumping and fighting with them in an efficient way
Loyal Inventor Artifact tutors are always good, and Loyal Inventor will, in the right deck, not be clunky