Shadowmoor

{t}, {x}{g/w}: If {w} was used to activate this ability,
put a persist counter on target creature you
control with mana value X or less. If {g} was
used to activate this ability, gain 1 life for each
creature you control with a counter on it. If
{g} and {w} were used to activate this ability,
do both. (When a creature with persist dies,
if it had no -1/-1 counters on it, return it to
the battlefield under its owner's control with a
-1/-1 counter on it.)