Cross the Narrow Sea

(Start the game with this conspiracy face up in the command zone.)
The Narrow Sea starts with six time counters on it.
At the beginning of your upkeep remove a time counter from The Narrow Sea.

Creatures you control can't attack and creatures you don't control can't attack you unless their controller pays {x} for each attacking creature, where {x} is equal to the number of time counters on The Narrow Sea.