The biggest hits so far were an Avenger of Zendikar when I was ahead in lands of the player casting it, and a Dockside Extortionist that gave me enough treasure to cast Cyclonic Rift with my opponents Dockside trigger still on the stack
In conclusion, blue ramp cards serve multiple strategic purposes, from accelerating mana for high-cost spells to maintaining card advantage and control
How strong is the companion mechanic
Settle the Score I always wanted to run Spread the Sickness in my Superfriends list but I could never justify its high mana cost
Rhys the Exiled makes an appearance, but its (again) not like the rogue deck in Zendikar Rising
Midnight Reaper A key card draw engine for Teysa Karlov style aristocrats decks as well as Wilhelt, the Rotcleaver zombie decks, there are only so many cards that do what Midnight Reaper does, so this is a must have for a ton of black decks