Trinisphere, Leyline, Chalice, are all good, I can usually mulligan to one or more of these cards effectively. I have a decent record against BR with this strategy. Bridge is also very strong against every threat except griselbrand.
What are you doing when you land turn 1 relic, pass with no mana to activate, and they go ritual unmask/thoughtseize entomb reanimate? Because even with tomb you can't keep the mana in your pool, you'd need at meast mountain relic chrome mox/guide on your opener to stop their turn 1 play

