Both of those things are okay
Picking a favourite is a difficult choice as there are so many amazing cards tied to the game and I am beyond excited to get my hands on these cards

Academy at Tolaria West Aetherflux Conduit Asmodeus the Archfiend Backup Plan Celestial Convergence Cephalid Sage Chandra, Flame's Catalyst Colfenor's Plans Contract from Below Damia, Sage of Stone Drastic Revelation Dreadwing Scavenger Embrace My Diabolical Vision Ephara, God of the Polis Excavating Anurid Gilt-Leaf Archdruid Griselbrand Heaven Sent Illuminate History Into the Story Jace, Wielder of Mysteries Jace, the Living Guildpact Jin-Gitaxias Jin-Gitaxias, Core Augur Kefnet the Mindful Keranos, God of Storms Ketramose, the New Dawn Kiora, the Rising Tide Kozilek, the Great Distortion Library of Alexandria Lich's Mirror Lost Isle Calling Magus of the Library Midnight Clock Midnight Oil New Perspectives Nicol Bolas, the Deceiver Nothic Parallel Thoughts Phone a Friend Pursuit of Knowledge Ral, Caller of Storms Raphael's Technique Reforge the Soul Resonating Lute Ruin Grinder Sail into the West Scroll of Origins Shoreline Looter Spirit Water Revival Stunning Reversal Tallyman of Nurgle Tersa Lightshatter The Grand Evolution The World Spell Thought Shucker Timetwister Trenzalore Clocktower Ugin, the Spirit Dragon Weatherlight Compleated Weftwalking Wheel and Deal Wheel of Fortune Wheel of Potential Your Plans Mean Nothing

All of the Merlin cards give an ability when returned to hand, like the Merlin Crab which gives another character +3 strength when challenging, when they are played, and when they leave play (which can be in the same turn for a super boost), and Madam Min returns cards to hand when played
Card and exclusive sleeves complete this set and ensure you are ready to play immediately
Mulch Mulch showed up last in the first Innistrad set, where it helped to define graveyard-based decks of that era