Cast Balancing Act by paying {2}{W}{W}.
Holding priority, cast Perch Protection by paying {4}{W}{W} and choosing to promise an opponent a gift, causing all permanents you control to phase out and an opponent to take an extra turn after this one.
Resolve Balancing Act, causing each opponent to sacrifice all their permanents as you control no permanents that aren't phased out.

Each opponent sacrifices all permanents they control

Mass Land Denial

Balancing Act

Perch Protection

Cast Perch Protection by paying {4}{W}{W} and choosing to gift an extra turn, causing your life total to be unable to change until your next turn.
Cast Ad Nauseam by paying {3}{B}{B}.
Resolve Ad Nauseam, revealing the top card of your library, putting that card into your hand and losing no life due to Perch Protection
Repeat the process in step 3 as many times as desired.

Combos with "Perch Protection"