Devouring Ooze

{g}{g}{b}{b}, {t}: Take control of target creature
of power less than that of Devouring Ooze. That
creature and Devouring Ooze gain Defender and
cannot use activated abilities. If Devouring Ooze
blocks while in this state, the controlled creature
must block the same target.
"The dungeon's floors were spotless. That should
have been our first clue."