Space Time Continuum

When this card enters the battlefield, create four
zones until this enchantment leaves play. Zone X,
Zone Y, Zone Z, and The Time Zone. Then for
each non continuum permanent each player controls, they assign it a zone starting with you.
Whenever a player plays a permanent card, they
assign a zone to it as it enters the battlefield. Permanents
can only block and target permanents within the
same zone. Permanents in the Time Zone have
shroud and cannot attack or block.