SMS Emden

When SMS Emden enters the battlefield, exile it. Create a
3/3 red artifact creature token named White Emden that
has lifelink and indestructible. Then create a 3/3 black
artifact creature token named Black Emden that has
deathtouch and indestructible.

Return SMS Emden to the battlefield transformed as an
enchantment and it has: Whenever White Emden causes
you to gain life, put a +1/+1 counter on Black Emden.
Whenever Black Emden sends a creature to a
graveyard, put a +1/+1 counter on White Emde