Lothorewyn, the Corrupted

Emerge {3}{b}{g}
When Lothorewyn, the Corrupted enters the battlefield, put the top ten cards of your library
into your graveyard. If one or more +1/+1
counters would be put on a creature you control,
twice that many +1/+1 counters are put on it
instead. If one or more -1/-1 counters would
be put on a creature you control, twice that
many -1/-1 counters are put on it instead.