Master Chief, S-117

Vigilance, Mentor (When this creature attacks, you may put a +1/+1 counter on target attacking creature with lesser power.)

Lone Spartan - As long as you control no other creatures, Master Chief, S-117 gains +2/+2.

Cortana's Guidance - {2}, Discard a card: Scry 2, then draw a card. If an artifact was discarded this way, you may cast it.

"Sir, I'm going blankie mode."