Morbid Keymaster

Morbid Keymaster enters the battlefield with
three lock counters on it.
{2}, remove a lock counter from Morbid Keymaster: Choose a creature you control. That creature
cannot attack or block as long as it has a lock
counter on it.
{3}, Sacrifice Morbid Keymaster: Remove all lock counters from friendly creatures and put three
+1/+1 counters on them for each lock counter
removed.