Soft-furred Sleeper

At end of combat during your turn or if you
were attacked that combat, if Soft-furred
Sleeper didn't attack or block that combat, put
a +1/+1 counter on each other creature you
control that didn't attack or block that combat.
At the beginning of your end step, if you cast no
spells this turn, you gain 2 life.
Feel that fluffiness. Hear that rumbling purr.
Nothing else matters.