Artists get to find their own way with the artwork, but they can also submit basic sketches if needed to make sure theyve perfected the feel thats wanted, which is what Finnigan does
I also dipped into some other cards like Birds of Paradise for the mana needs
(And maybe the Gotcha mechanic
Since your commander is focused on playing more Eldrazi, most spells are Eldrazi spells around a third of the deck, and that matters because whenever you cast an Eldrazi spell, you can pay 2 colorless mana to copy all spells you control, then copy all your triggered abilities and activated abilities on the stack
The other mode with Winter Orb is not to bother locking down your opponent fully, just to operate far better than he can and win the game in a fight with efficient creatures
You can cast it for its harmonize cost, upping the green commitment to four but now letting you tap creatures to pay for that X cost