Tablet of the Midnight Sun

Sacred (This permanent cannot be sacrificed.)
{t}, Pay 1 life: Add {w} or {b}. If Tablet of the
Midnight Sun's owner does not control it, they
gain 1 life.
At the beginning of each player's upkeep that
player gains control of Tablet of the Midnight
Sun. Untap it. At the end of each upkeep its
owner gains control of it.