Derry Cathain, Ripclaw Rider

When Derry Cathain, Ripclaw Rider enters the
battlefield, each opponent reveals their hand. For
each opponent, exile up to one instant, sorcery,
or enchantment card from their hand. For as
long as they remain exiled, their owners may cast
them. Cards exiled this way cost {2} more to cast.
{4}: Derry Cathain's base power and toughness
become 4/4. Put a trample counter on it.