Android 17

Partner with Android 18
Haste, Vigilance, First Strike
When Android 17 would be blocked, you may pay {u}{r}, if you do, prevent all damage that would be dealt to 17 this combat.
When Android 17 attacks, he deals X damage to any target, where X is the number of artifacts you control multiplied by 17's power.
Android 17's toughness is equal to 4 + the number of artifacts you control.