Whirler Virtuoso is one of the sweeter ways to cash in energy. A Module plus Whirler gives you four energy which if you spend three on getting a thopter brings the energy count to two. Almost giving you enough for two activations.
Vexing Scuttler would have been a cool rare I think, if it gave you a card you own back from your graveyard or exile (it is an Eldrazi after all). If it did, it could have an interaction with Eldritch Evolution.
Interesting, if not that good, Ball Lightning variant with provoke for red.
The "eldrazification" may be something similar to delirium or madness. You lose sanity and at the end when sanity is all lost... hellbent?
It's a wild guess to say that there could be a transform mechanic based on having no cards left in hand, but who knows? The Hanweir front-side dies, and then if you have no cards in hand you pay a cost to return it to the battlefield "eldrazified".
"Tap an untapped Soldier you control: Roman Chariot becomes an artifact creature until end of turn."
Woodweaver's Puzzleknot
2
Artifact
When Woodweaver's Puzzleknot enters the battlefield, you gain 3 life and get EEE (three energy counters).
2G, Sacrifice Woodweaver's Puzzleknot: You gain 3 life and get EEE.
Interesting, if not that good, Ball Lightning variant with provoke for red.
It's a wild guess to say that there could be a transform mechanic based on having no cards left in hand, but who knows? The Hanweir front-side dies, and then if you have no cards in hand you pay a cost to return it to the battlefield "eldrazified".