Presenting 1v1 Pauper Cavern Harpy U/B control. The general is a built-in recursion engine in disruption heavy CIP effect creature colors so I won't go into the various synergies. Surprisingly enough, there're many ways to lock your opponents out in pauper U/B with near infinite bounce at your disposal but the general gameplan is to maintain tempo/control with cheap bounce/discard/counter effects and win via general damage. Recursion is a big theme here and by ms.harpy's nature allows us to "efficiently" operate in the battlefield while evading removal. Almost all the creatures on the list have CIP effects that work with her. Cheap bounce / hand disruption /counters allows the deck to control the tempo while grave recursion effects lets us maintain the hold as the deck curves out better than others.
Happy disrupting
1 Cavern Harpy
Lands
14 Swamp
14 Island
1 Command Tower
1 Dimir Aqueduct
1 Terramorphic Expanse
1 Evolving Wilds
1 Grixis Panorama
1 Esper Panorama
1 Halimar Depths
1 Bojuka Bog
1 Seat of the Synod
1 Vault of Whispers
Ramp/Fixing
1 Expedition Map
1 Mind Stone
1 Wayfarer's Bauble
1 Nightscape Familar
1 Dreamscape Artist
1 Dread Drone
Utility
1 Adventuring Gear
Gravehate
1 Shred Memory
1 Nihil Spellbomb
Tutors
1 Trinket Mage
1 Dimir Houseguard
1 Mystic Remora
1 Ninja of the Deep Hours
1 Forbidden Alchemy
1 Sea Gate Oracle
1 Mulldrifter
1 Rhystic Study
1 Foresee
Hand Disruption
1 Hymn to Tourach
1 Ravenous Rats
1 Augur of Skulls
1 Chittering Rats
1 Liliana's Specter
1 Consult the Necrosages
1 Okiba-Gang Shinobi
1 Helm of the Ghastlord
Counterspells
1 Counterspell
1 Muddle the Mixture
1 Arcane Denial
1 Brine Shaman
1 Exclude
1 Perplex
1 Soul Manipulation
1 Spiketail Drakeling
1 Faerie Trickery
1 Snuff Out
1 Stinkweed Imp
1 Executioner's Capsule
1 Agony Warp
1 Ashes to Ashes
1 Brainspoil
1 Crypt Rats
1 Faceless Butcher
1 Pestilence
Recursion
1 Unearth
1 Grim Harvest
1 Disturbed Burial
1 Grim Discovery
1 Cadaver imp
1 Archaeomancer
1 Gravedigger
1 Mnemonic Wall
Bounce
1 Echoing Truth
1 Sedraxis alchemist
1 Into the Roil
1 Capsize
1 Aether Adept
1 Aethersnipe
1 Man-o'-War
1 Recoil
1 Mist Raven
Considerations:
Mesmeric Fiend, Duress, Ostracise (Hesitant against 1 for 1 / tmp effects)
You may want to test out AEther Spellbomb and Executioner's Capsule as additional targets for Trinket Mage. Cards like Vedalken AEthermage, Scrivener, Death Denied, Merchant Scroll, and Mystical Teachings are great in UB control builds like this as well. Finally Ghostly Flicker is amazing mid and late game. Especially in combination with Archaeomancer and the like.
Good stuff. Ghostly flicker is pretty sweet. Also considering sedraxis alchemist and Okiba-Gang Shinobi