Nicol Bolas, the ineffable

When Nicol Bolas, the ineffable enters the battle field, randomly choose half(rounded up) of all permanents, not including Nicol Bolas, the ineffable, and exile them.
{w}{g} search your library for X amount of basic lands, take X damage, and put X -1/-1 counters on this card
{b}{r} sacrifice permanent you control, then destroy two target permanents an opponent controls
{t}{8}{u}{u}{u} mill all but one card from target opponents library