Valar, Soul Weaver

Whenever a creature enters the battlefield under
your control, put a +1/+1 counter on Valar, Soul Weaver.
{b/g}, {t}: You may move any number of +1/+/1 counters from Valar, Soul Weaver and put them
onto any other creatures you control.
Remove a +1/+1 counter: Prevent damage that
would be dealt to Valar, Soul Weaver this turn.