D-Dog, Loyal Companion

Vigilance
Keen Senses: Whenever D-Dog enters the battlefield or attacks, you may look at the top card of your library. If it's a creature card, you may reveal it and put it into your hand.
Companion's Loyalty: Whenever D-Dog is enchanted, you may have target creature gain +1/+1 until end of turn. If that target is Venom Snake he gains +3/+3
"His loyalty runs deeper than blood, and his instincts are sharper than any blade."