The stat difference was too significant; my opponent was planning to defeat me with magic, but he "forgot" to check for the cloak. Thanks for the game.
There was no point in delaying; he couldn't see the water elementals, there was no air control, and the mana difference was 500 vs. 45. He wouldn't have attacked if I had used Orb, but the cloak couldn't have influenced his decision to attack.
Thanks for the game!