Crypt Chamber

Whenever a Chamber enters the battlefield
under your control, put a charge
counter on Crypt Chamber.
{t}, Remove three charge counters from Crypt
Chamber: Create a 3/2 Green Giant creature
token with reach. Activate this ability only at any
time you could cast a sorcery.
{1}, {t}: Target creature gains +2/+1 and
"Creature cannot block attacking creatures with
power three or less" until end of turn.