Shambler

Infect (This creature deals damage to creatures
in the form of -1/-1 counters and to players in
the form of poison counters.)
If damage would be dealt to Shambler, prevent
that damage. Put a -1/-1 counter on Shambler
for each 1 damage prevented this way.
I struggled for a long time with surviving. And
no matter what, you keep finding something
to fight for.