More Than Meets the Eye 2RGW (You may cast this card converted for 2RGW.)

Ward 2

Whenever Ultra Magnus attacks, you may put an artifact creature card from your hand onto the battlefield tapped and attacking.

If you do, convert Ultra Magnus at end of combat.
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Ultra Magnus, Armored Carrier

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

Haste

Formidable — Whenever Ultra Magnus attacks, attacking creatures you control gain indestructible until end of turn. If those creatures have total power 8 or greater, convert Ultra Magnus.