At the beginning of your upkeep, sacrifice this creature unless you discard a card
Then you can spend two mana any time to suspend any non-land from your hand, and then it has four time counters
Until end of turn, it gains hexproof, reach, and "Whenever this creature becomes tapped, it deals damage equal to its power to up to one target creature." Untap target creature
While it is completely valid to design around his host/augment rules text in Commander, I feel like the list of available cards for this color identity is too short to make it a major theme of your deck
The perspective used here, which has the viewer looking up at the Engine from ground level, works alongside the clouds and swathes of sky to establish a sense of scale