Grixis Field

Grixis Field enters the battlefield tapped.
{t}, Pay 1 life: add {u}, {b}, or {r} to your mana pool.
{u}{b}{r},{t}, Sacrifice Grixis Field; Search your
library for a blue, black, or red creature card,
reveal it, and put it into your hand. Then shuffle
your library.
Grixis is a world where the only things found in
abundance are death and decay.