That's because it's generally good for the strongest deck in Standard to have to change up some cards with every set to keep the metagame fresh
Giving your artifact creatures flying/lifelink can be strong, but you have to be built for proliferation effects, artifacts, and payoffs for the actual counters from proliferating
Your Burnished Harts will fetch you four lands, your Mindslavers will let you control two different opponents and your Time Sieves will give you two additional turns
Read More: Have a look at the new Judge Promos 6 Exsanguinate Exsanguinate drains life from everyone at an impressive rate, but youll need a lot of mana to get the most out of it
You can pay additional costs such as kicker costs
If you clone that with Volrath, you end up with a flying, double-striking, indestructible 7/5 with vigilance