If you are unable to pay the cost when the card is turned face-up, it is sent to the Dark Area
Once you suit this pseudo-flying creature up with an Ethereal Armor and Ancestral Mask, your opponents find themselves facing down a massive, unblockable, untargetable creature that grinds them into the ground
This deck happens to be mono-black, a divergence from the other Commander decks which are all three colored decks to better represent their galactic empires
In any case, giving your opponents multiple instances of three damage on their upkeeps will end games fast
Destroy a flying creature Green normally doesn't get to destroy creatures, but it has three exceptions: flying creatures, artifact creatures, and enchantment creatures (I'll get to the second and third below)
Conversely, "Blue Traveler" can be used to Summon "Superdreadnought Rail Cannon Flying Launcher", which can search "Infinitrack Harvester" which can then search "Dozer"