Ghostly Fortress

All creatures you control gain Hexproof.
Blue creatures you control gain +0/+1, and
another +0/+1 if of the Illusion or Spirit type
When Ghostly Fortress enters the battlefield,
you gain 5 life.
When Ghostly Fortress leaves the battlefield,
you lose 5 life.
When Ghostly Fortress becomes the target of a
spell or ability, sacrifice it.
"The memories in crumbled foundation stones of
an old bastions can be made into glowing a redoubt."