Meclyx, Power Chamber

Whenever a creature you control becomes
blocked, you may transfer all counters from
blocking creature to attacking creature until
end of combat or if there are none to transfer,
put a +1/+1 counter on attacking creature and a
storage counter on Meclyx, Power Chamber.
At your end step, if this card has 10 or more
storage counters on it, sacrifice it and remove
all counters from all permanents with counters,
and destroy all nonland permanents without
counters.