Emba's Ambition

Emba's Ambition gets +1/+1 for each artifact
you control. When it attacks, it gets +1/+1 for
each artifact defending player controls.
If its power is 7 or greater, Emba's Ambition
has menace. If its toughness is 7 or greater,
Emba's Ambition has trample.
Basic landcycling {2}