The First Sliver: b4 -> b3

Remove (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

Add (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