Ephira

When Ephira enters the battlefield tap
all creatures each opponent controls and they
don't untap during untap steps. Loyalty abilities
of planeswalkers opponents control can't be
activated. pay : {5} take control of target creature. creatures you control have shadow link
(whenever this creature does combat damage to a creature or planeswalker take control of
that creature or planeswalker and if it's a creature it becomes a shadow
in addition to it's other creature types).