More Than Meets the Eye 1W (You may cast this card converted for 1W.)

Lifelink

Whenever you gain life, you may convert Ratchet. When you do, return target artifact card with mana value less than or equal to the amount of life you gained this turn from 1 your graveyard to the battlefield tapped.
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Ratchet, Rescue Racer

Living metal (As long as it's your turn, this Vehicle is also a creature.)

Lifelink

Whenever one or more nontoken artifacts you control are put into a graveyard from the battlefield, convert Ratchet. This ability triggers only once each turn.