Lord Lord, Lord of the Lords

Lord Lord, Lord of the Lords' power and
toughness are equal to the number of creatures
you control that give other creature types +1/+1
based on their creature type.
All creatures that give other creature types +1/+1
based on their creature type get +1/+1, except for
Lord Lord, Lord of the Lords, which gets +2/+2,
unless there is another creature that gives it
+1/+1, in which case it gives itself +1/+1 instead.