Mimic Tear

When this creature enters, put a -1/-1 counter on it and target creature you control. This becomes a copy of that creature except it is an artifact in addition to its creature types and has the following ability:
{1}{b}{g},{t}: Put a -1/-1 counter on target creature you control. This becomes a copy of that creature except it is an artifact in addition to its creature types and has this ability.

Better than Black Knife Tiche...