Negative Power

when played, swap the power and toughness of
ALL creatures (including ones not on the battlefield!).
{w/b} add a 1/1 token to all lands on the battlefield
and turn them into land creatures.
{w/b}shuffle all planeswalkers into their owner's
library. players are immune to damage this turn.
"all the planeswalkers are gone! and
why is everyone doing handstands now!?"