Cam, the Forgotten

{t} Add {g} or {w}
At the beginning of your end step, if Cam's
ability was not used, generate 1 forgotten token.
At the beginning of each opponent's end step, if
Cam wasn't a target of a spell or ability, that
player gains 1 life and you generate a forgotten
token.
Sacrifice 5 forgotten tokens: Prevent all damage
that would be dealt this turn.