Prison of the Scarlet King

When Prison of the Scarlet King is summoned,
create 7 0/0 Chain tokens. Each time a creature
dies on the battlefield, destroy one 0/0 chain
token on the field. Once all 7 0/0 chain tokens
have been destroyed, flip this card.
{3}: Tap a target creature
{3}: When an opponents spell or instant is
activated it, pay {3} and counter it.
{7}: Destroy all 7 0/0 Chain Tokens. Flip this
card.