Professor Ghostwood

First strike, lifelink.
At the beginning of your endstep choose between
life and death.
• Life - each player gain X life, where X is the
number of creatures that player control. Each
player who gains the most life sacrifice a creature.
• Death - each player loses X life, where X is
the number of creatures that player control.
Each player who loses the most life can return
a creature from his graveyard to the
battlefield.