Monarch

Chaingun- Whenever Monarch attacks, put a +1/+1 counter on her and draw a card
Energy Siphon- At the beginning of each combat on
an opponent's turn, deal X damage to target creature, where X is the number +1/+1 counters on Monarch
Upgrade Core- {5}: Put a double strike, menace, vigilance, or reach counter on Monarch
Crew 3
Monarch can be your commander