Castle Karadius

This land enters the battlefield tapped unless your commander is already in play.
{t}: Add one mana of any color a land you control
can produce.
{t}: Add one mana of every color in your color
identity. This land doesn't untap during your
next untap step.
{ut}: Add {5} (Only on an opponent's turn)
If you don't use all of it this turn, lose 2 life for
each unspent mana.