Techroid

Vigilance, Trample, Menace, Flying, Lifelink
When you cast Techroid, add X +1/+1 counters to it. At the beginning of each attack phase, you may have Techroid exile target nonland permanent. If that permanent was a creature, put Y +1/+1 counters on Techroid, where Y is that creatures highest stat. If that permanent was an artifact/enchantment, you gain life equal to that artifact/enchantment's converted mana cost.
{x}{{3}}: Add X +1/+1 counters to Techroid.