Undercity Scuttler

Whenever a player casts an instant or sorcery
spell, Undercity Scuttler gets -1/-1 until end of
turn.
When Undercity Scuttler dies, you may pay 2
life. When you do, put it into its owner's
library second from the top
So wary, for its size. Then again, maybe being
careful has let it grow to its full size despite the
dangers of its home.