Nyarlathotep, Crawling Chaos

Deathproof Hexproof
Whenever a creature card is put into an opponent's graveyard from anywhere, you
may have Nyatlathotep, Crawling Chaos become a copy of that card except it's name
is still Nyarlathotep, Crawling Chaos, it's legendary in addition to it's other types,
and it gains deathtouch hexproof and this ability.