Underground Sewer

{t}, Sacrifice Underground Sewer: Search your
library for a basic Plains, Island or Swamp card,
put it onto the battlefield tapped, then shuffle
your library.
{u}, Exile Underground Sewer from your
graveyard: Create a 1/1 blue Midge creature
token with Flying that counts as an Insect.
"Life is like a sewer: what you get out of it depends on
what you put into it." - Tom Lehrer