Reaper, Soul Lord

Deathtouch, Lifelink.
When Reaper, Soul Lord enters the battlefield,
you get the Reaper token.
{p/b} Target player gains the Reaper token.
Reaper, Soul Lord's power (*) is 2X, where X is
the number of creature cards in the graveyard
of the player with the Reaper token.
If the player with the Reaper token dies,
return the token to the controller of Reaper, Soul
Lord.