Amalia Benavides Aguirre Arvad the Cursed Astarion, the Decadent Baron Bertram Graywater Bartolom del Presidio Blood Baron of Vizkopa Blood-Cursed Knight Carmen, Cruel Skymarcher Clavileo, First of the Blessed Cleric of Life's Bond Cliffhaven Vampire Cruel Celebrant Drana and Linvala Drana's Emissary Edgar, Charmed Groom Elenda, Saint of Dusk Elenda, the Dusk Rose Felisa, Fang of Silverquill Indulging Patrician Legion Lieutenant Markov Purifier Order of Sacred Dusk Pitiless Pontiff Regal Bloodlord Ruthless Lawbringer Sanguine Savior Silverquill Pledgemage Tithe Drinker Verrak, Warped Sengir Vish Kal, Blood Arbiter Vito, Fanatic of Aclazotz Vizkopa Vampire Vona, Butcher of Magan Wispdrinker Vampire
You can devour them because MTGs rules allow you to sacrifice indestructible creatures
The Dragonstorm cards from Tarkir: Dragonstorm can provide repeatable effects whenever a dragon enters the battlefield
Shaymin-EX is one of the reasons that Hoopa-EX is so good, because you can set up your field while drawing cards, which is just incredibly powerful
In both Standard and Pioneer, the Merfolk archetype has fallen short