You can use his blink ETB on another Oath, or to reset a planeswalker's loyalty counters after using a -X ability, or whatever else
Suddenly you could splash Twisted Abomination and a single Swamp - if you drew the Swamp, you could play the Abomination, and if you didn't draw the Swamp and drew the Abomination, you could fetch the Swamp and thin your deck
Amonkhet was a bright spot (ironically), but didnt make waves outside of a handful of cards, most of which were obvious Commander cards like Anointed Procession, The Scarab God, and our official free preview of Cascading Cataracts
Changed Chiming Tutor
What did surprise me though is how nice the Graveyard subtheme ended up being: I count 20 cards that interact with the graveyard directly with a very generous definition, including anything that recurs (Starfield of Nyx), puts itself in the graveyard (Binding the Old Gods), puts other enchantments in the graveyard (Nyxborn Behemoth), or triggers off enchantments going into graveyards (Narci, Fable Singer)
Reyhan, Last of the Abzan Reyhan, Last of the Abzan is a commander-conscious version of modular and an excellent way to keep power on the battlefield