Great Library on Ossus

When this card enters play, put 2 Lore counters
on it.
{t}: Remove a Lore counter from Great Library
of Ossus. Add two mana of any color.
{t}: add {c}{c}
If this card has no Lore counters on it,
sacrifice it. If you do, you may search
your library, hand, graveyard, and exile for a
card named "The Great Holocron" and put it
into play.