Lockdown

When Lockdown enters the battlefield: Add 3 Countdown Counters to it.
At the End Phase of your Oponnent: Remove 1 Counter from it.
When all Counters are removed: Enemey creatures can't attack or block for 1 Round.
Neither can you activate creatures abilitys,instant ,Sorcery spells
or play any cards at all.
All Enemy Permanents on the Battlefield loose their abilitys for the same time.