draw: (1d50)[2]
untap bottomless vault.
play mountain.
tap bottomless vault, removing two counters from it. tap two mountains, tap cascade bluffs(adding two blue mana). play traumatize.
(you have to discard half of your library)
field:
lands: bottomless vault(0)[T], 2xmountain[T], cascade bluffs[T]
Artifacts: Golden urn(1)