Through the Omenpaths Set Mastery 23 Through the Omenpaths packs 5 Mastery Orbs (redeemable for a card style or sleeve in the Through the Omenpaths Mastery Emporium) Through the Omenpaths Mastery Pass Avatars Sliver Gravemother avatar Cards and Packs 20 Packs 4 Through the Omenpaths packs 4 Edge of Eternities packs 4 Tarkir: Dragonstorm packs 4 Aetherdrift packs 4 Magic: The Gathering Foundations packs 10 Through the Omenpaths mythic rare individual card rewards (ICRs) Level 61+: 1 Uncommon ICR Card Sleeves Druneth, Reviver of the Hive sleeve Fateweaver exquisite sleeve Card Styles 35 Mastery Orbs (redeemable for a card style or sleeve in the Through the Omenpaths Mastery Emporium) 15 Common card styles 10 Uncommon card styles Event Tokens 1 Player Draft token (redeemable for a Premier or Traditional Draft entry) Gold and Gems 4,000 Gold 1,200 Gems Companions 3 Sliver companions How Many Levels Are in the Through the Omenpaths Set Mastery

You also get two foil Floodborn characters, The Queen, Commanding Presence and Gaston, Intellectual Powerhouse, as well as some shift targets and a couple of support cards in Grand Duke and Lefou respectively
Siefer is just awesome, and a massive threat
They include Ravages of War, which destroys every land on the table regardless of who put it in play, and a unique take on the venerable Sol Ring.
And its colorless, which makes it perfect to drop into equipment-matters Commander decks