First and foremost, enormous thanks to Priscillia [link]
for allowing me the use of her work for the card's picture. I decided to use the special promo frame for the special picture. Here's the original in all its glory. [link]
It was a pretty simple process from game to card. Or at least, I knew what I wanted the card to do immediately going into it. Heavenly Strike delays an enemy's turn. In Magic, there're a few ways to delay a creature, done differently across various colors. White "pacifies" its enemies, making them unable to attack and/or block; whereas blue prefers to keep an enemy frozen, keeping them tapped down. In game, Shiva has high evasion and the fact that she's one of the better physical attacking Aeons made islandwalk and a third point of power seem appropiate, which also bumped her to 3U casting cost from 1UU.
Here's the card text, for those having trouble reading the white text over the light blues of the art.
Legendary Creature Aeon
UU, T: Put a frost counter on target creature. It gains Whenever this creature becomes tapped, it doesnt untap your next untap step.
When Shiva leaves the battlefield, remove all frost counters.
Artwork is entirely copyright and property of Priscillia, who I, once again, humbly thank for permitting me the use of her artwork. All intrinsic Magic the Gathering game concepts are copyright Wizards of the Coast. Characters and names are copyright SquareEnix.