Protection that requires me to keep more than 1 mana up, such as Counterspell or Heroic Intervention. I don't want to delay dropping the Bridge for more than one turn if I expect resistance.
Protection that might not get the job done, such as Flusterstorm.
1 The Prismatic Bridge (Esika, God of the Tree)
Best of the Best:
1 Agent of Treachery
1 Ashen Rider
1 Astral Dragon
1 Avacyn, Angel of Hope
1 Beledros Witherbloom
1 Elesh Norn, Grand Cenobite
1 Elspeth, Sun's Champion
1 Jin-Gitaxias, Progress Tyrant
1 Liliana, Dreadhorde General
1 Nicol Bolas, Planeswalker
1 Piru, the Volatile
1 Professor Onyx
1 Shadowgrange Archfiend
1 Sisay, Weatherlight Captain
1 Sphinx of the Second Sun
1 Ugin, the Spirit Dragon
Bridge Synergy:
1 Lithoform Engine
1 Paradox Haze
1 Strionic Resonator
Bridge Defense:
1 An Offer You Can't Refuse
1 Blacksmith's Skill
1 Deflecting Swat
1 Fierce Guardianship
1 Force of Negation
1 Force of Will
1 Greater Auramancy
1 Misdirection
1 Pact of Negation
1 Sol Ring
1 Sterling Grove
1 Stifle
1 Swan Song
1 Tamiyo's Safekeeping
1 Turn Aside
1 Veil of Summer
10 Talisman of Curiosity (and other talismans)
1 Arcane Signet
1 Carpet of Flowers
1 Chrome Mox
1 Courier's Briefcase
1 Curse of Opulence
1 Exploration
1 Explore
1 Farseek
1 Fellwar Stone
1 Fertile Ground
1 Growth Spiral
1 Jeweled Lotus
1 Kaleidostone
1 Lotus Petal
1 Mana Crypt
1 Mana Drain
1 Nature's Lore
1 Strike It Rich
1 Three Visits
1 Utopia Sprawl
1 You Find a Cursed Idol
Lands:
10 Tropical Island (and other duals)
10 Misty Rainforest (and other fetches)
10 Breeding Pool (and other shocks)
1 Aether Hub
1 City of Brass
1 Command Tower
1 Exotic Orchard
1 Forbidden Orchard
1 Gemstone Caverns
1 Island
1 Mana Confluence
1 Plaza of Heroes
1 Tarnished Citadel
1 Tendo Ice Bridge
1 Urza's Saga
Thoughts? Suggestions? (Please keep in mind the Strict Personal Rule.)