Quote from RohanZ
by "look at a block" do you mean hold it in your hand or actually look at is when its placed? and the mob IDs are on the wiki right, just incase typing "creeper" doesn't work?
Hey... I just tried both you guys things and none worked. Says that "/spawner" isnt a proper command.
ive got minecraft 1.5.2, by the way... no mods, nothing..?
Quote from MossStoneLover64
That requires the SPC mod.
Quote from Keldeo
To give yourself a monster spawner, type /give 52. To change the mob in the spawner, type /spawner [mob ID]
Hope I helped