With any of these, just make sure not to target instants and sorceries
Of course, nothing screams ULTIMATE VALUE like casting Flood of Tears and immediately dropping down Omniscience
The first card that sprang to mind is Wall of Reverence
At a slightly higher level of competition, Mark Justice and Henry Stern really pushed the absurdity of Channel + Fireball to new heights at US Nationals 1995
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The usual suspects apply for sacrifice outlets: From there you can just win the game by attacking with your arbitrarily large army of amoebae, from the triggers on something like Blood Artist or Zulaport Cutthroat, or by gaining arbitrarily large amounts of life