Exiling is not countering, so Leyline of Lifeforce wont argue
Honorable Mention: Fecundity and Heartwood Storyteller Fecundity is a powerful draw engine in a creature deck, but it draws cards for not just you, but everyone
Journey into Nyx Standard | Eric Rill Planeswalkers (7) 1 Jace, Memory Adept 2 Elspeth, Sun's Champion 4 Jace, Architect of Thought Spells (26) 1 Negate 1 Syncopate 2 Celestial Flare 4 Azorius Charm 4 Dissolve 4 Sphinx's Revelation 4 Supreme Verdict 1 Banishing Light 4 Detention Sphere 1 Elixir of Immortality Lands (27) 5 Island 5 Plains 1 Temple of Deceit 1 Temple of Silence 3 Mutavault 4 Azorius Guildgate 4 Hallowed Fountain 4 Temple of Enlightenment Sideboard (15) 2 Nyx-Fleece Ram 1 Deicide 2 Celestial Flare 1 Aetherling 1 Blind Obedience 1 Dispel 1 Negate 1 Pithing Needle 2 Gainsay 3 Last Breath While he definitely fits there, Nyx-Fleece Ram has potential in a main-deck slot
For instance, you could use them to slam down an Emrakul, The Promised End a bit earlier than anyone is prepared for
When Wizards of the Coast previewed this card, they even mentioned this synergy during the livestream
Basically, if you have typal synergies, youll get the best of this mass reanimation effect
