Its not the only card with halves in its power/toughness, but its certainly one of the funnier ones
Without first strike, other removal or sac outlets to turn this on you have to use it like a Reciprocate to get a double hit and that is assuming you can get something dead in combat
They have the highest monetary value, but the lowest sentimental value
Engines: Cryptbreaker ($1.00), Undead Augur ($0.35), Gravecrawler ($1.35), Graveyard Marshal
You can pull a disappearing act in response to a boardwipe or attack, or use it on your own turn to prevent payback after overextending
However, if its not able to be dealt damage because its neither a creature nor a planeswalker, or its no longer on the battlefield, then the damage is not redirected and is dealt to you as normal