mtg blue god card Rules Text: Devotion to blue, 9 cards Exile all graveyards. Thassa, God of the Sea

You'll put a +1/+1 counter on both creatures

Defenders are balanced around the fact that they wont be attacking, and turning these creatures into attackers with power equal to their usually high toughness is insane

With a mill theme in the article, Fraying SanityFraying Sanity also should get a look as it greatly accelerates that game-plan

As Luck Would Have It Barren Glory Battle of Wits Call the Spirit Dragons Chance Encounter Epic Struggle Form of the Approach of the Second Sun Gallifrey Stands Happily Ever After Hedron Alignment Helix Pinnacle Liliana's Contract Mayael's Aria Mechanized Production Mortal Combat Near-Death Experience Now I Know My ABC's Revel in Riches Simic Ascendancy Test of Endurance The Cheese Stands Alone

No wonder you can't use it in Standard, though, since it was printed in a Commander precon