The First Sliver: b3 -> b4

Remove (28):
- 1 Arcane Denial
- 1 Breeding Pool
- 1 Clever Concealment
- 1 Dormant Sliver
- 1 Dregscape Sliver
- 1 Endurance
- 1 For the Ancestors
- 1 Forest
- 1 Frenetic Sliver
- 1 Generous Gift
- 1 Guardian Project
- 1 Kindred Discovery
- 1 Path to Exile
- 1 Patriarch's Bidding
- 1 Plains
- 1 Raise the Palisade
- 1 Regal Sliver
- 1 Return of the Wildspeaker
- 1 Sliver Gravemother
- 1 Swan Song
- 1 Synapse Sliver
- 1 Syphon Sliver
- 1 Talisman of Curiosity
- 1 Taunting Sliver
- 1 Temple Garden
- 1 Thorncaster Sliver
- 1 Watery Grave
- 1 Yavimaya, Cradle of Growth

Add (28):
+ 1 Basal Sliver
+ 1 Bring to Light
+ 1 Deadly Rollick
+ 1 Deflecting Swat
+ 1 Demonic Tutor
+ 1 Diffusion Sliver
+ 1 Enlightened Tutor
+ 1 Fierce Guardianship
+ 1 Force of Negation
+ 1 Force of Will
+ 1 Gaea's Cradle
+ 1 Intruder Alarm
+ 1 Lavabelly Sliver
+ 1 Mana Drain
+ 1 Mana Echoes
+ 1 Morophon, the Boundless
+ 1 Mystic Remora
+ 1 Profane Tutor
+ 1 Pyre of Heroes
+ 1 Secluded Courtyard
+ 1 Shared Animosity
+ 1 Sliver Queen
+ 1 Spiteful Sliver
+ 1 Teferi's Protection
+ 1 Unclaimed Territory
+ 1 Urza's Incubator
+ 1 Vampiric Tutor
+ 1 Worldly Tutor