Eldrazi Parasites

You may have any number of cards called Eldrazi Parasites in your library.
Put X cards named Eldrazi Parasites on the bottom of your library: Gain control of target creature with toughness X or less. It is an Eldrazi in addition to its other types.
"Look at how small they are- how hard can it be? "
-Ilion, Ulvenwald Hunter