Cast Storm Herd by paying {8}{W}{W}, creating a number of 1/1 Pegasus creature tokens equal to your life total.
Cast Sylvan Paradise by paying {G}, targeting every creature you control.
Venerated Rotpriest triggers for each creature targeted by Sylvan Paradise.
Resolve the first trigger, causing an opponent to get a poison counter.
Repeat step 4 until an opponent loses the game due to having ten poison counters, then repeat for each other opponent.

Each opponent loses the game

Venerated Rotpriest

Storm Herd

Sylvan Paradise

Cast Sylvan Paradise by paying {G}, causing Quicksliver Elemental to become green until end of turn.
Activate all Forests and green mana-producing creatures you control by tapping them, adding at least {1}{U}.
Activate Quicksilver Elemental by paying {U}, causing it to gain all abilities from Patron of the Orochi until end of turn.
Activate Quicksliver Elemental using Patron of the Orochi's ability by tapping it, untapping all Forests and green creatures you control.
Repeat from step 2.

Combos with "Sylvan Paradise"