Cortona

Can only equip to spartans
When cortona enters the battlefield you may have her equip to a Spartan you control
When Equipped creature attacks it gets +1/+1 for each Spartan you control
{3} sacrifice Cortana target Spartan gains indestructible and hexproof till end of turn
When cortana dies return it to the field flipped under your control
AI chip 3 (Equip to target Spartan/space vehicle you control does not fall off when the vehicle becomes an artifact)