Senai, the Insatiable

Hexproof
Senai, the Insatiable"s power and toughness are
equal to the amount of creatures in your
graveyard.
{3}: Exile a creature from your graveyard. Senai,
the Insatiable gets +X/+X where X is equal to
that creatures toughness, and gains all that
creatures abilities until end of turn.