Knuckles, Steadfast Guardian

Gain +1/+1 for every other unit you control with "Guardian" in their traits.
If you control 5 or more activated power cards
with "Emerald" in their names, this unit can
attack unsuspended units.
[When Attacking] [Once per turn]: If you have
4 or more activated power cards with "Emerald"
in the name, unsuspend this unit.