You control permanents that can tap for at least ({2} magic symbol) .
({2} magic symbol) available.
Steps
Activate Kill Switch by paying ({2} magic symbol) and tapping Kill Switch, tapping all other permanents.
Untap all permanents you control during each opponent's untap step due to Unwinding Clock.
The opponent's permanents do not untap during the untap step due to Kill Switch.
On each opponent's turn except the turn before yours in turn order, activate Kill Switch by paying ({2} magic symbol) and tapping Kill Switch, tapping all other permanents.