First up, check out the two main set cards revolving around Ultima
The Master, Transcendent simplifies this into a two-card combo: your commander and a source of mill, like Mesmeric Orb or Court of Cunning
(2017-09-29) For a Vehicle to be able to attack, it must be a creature as the declare attackers step begins, so the latest you can activate its crew ability to attack with it is during the beginning of combat step
Or in some cases, Ive even seen it used to win a long game, when the opponent, could only draw two of the three cards required for the spell
Othelm will see that it went to the graveyard from the battlefield that turn and will let you bring it back for 2 mana, giving you two ETB triggers, often for less than the cost of casting the Evoke creature for its normal casting cost