There are enough creatures with those types in Black in this set that it will be pumping 3-5 of the creatures in your deck, and sometimes more, but the real value comes from the ability to make 1/1 Skeletons, which, if the Deathpriest is in play, will of course be 2/2 skeletons
Amonkhet Invocations are all about Control, include all new art and flavor text set on Amonkhet appear slightly more often than premium mythic rares
Winner: Tie Which deck has better card search/draw support
Snapcaster Mage has been a roleplayer in Modern ever since it was first printed, and has been a crucial card in some of the most recognizable Modern decks throughout history, whether it be the RUG Vial deck Shota Yasooka took to the World Championships in 2012, or the Jeskai Control deck Shaun McLaren took down Pro Tour Born of the Gods with in 2014
These have a sturdy cover that is water resistant
This gets exponentially bigger turn after turn so keep swinging with the Sovereign and you'll overwhelm your opponents eventually