I think Unnatural Growth and Mirari's Wake are the best but you do well to look at Colossal Majesty or Warstorm Surge
You can put Doubling Season in this spot too, but Aether Refinery is a lot cheaper moneywise, and does what youre wanting, while providing an energy outlet for big tokens
Create a 0/1 black Wizard creature token with "Whenever you cast a noncreature spell, this token deals 1 damage to each opponent." Wizards you control get +1/+0 and gain lifelink until end of turn
The beauty of spells like Blessed Respite is that you can use up one card slot to perform two very different functions
Bag End Porter + Mirrormere Guardian I want to shout out Bag End Porter and Mirrormere Guardian for being green dwarves, something that hadn't happened much until Lord of the Rings
You could consider the bug a funny little 'test your knowledge' experiment, but it is a potentially aggravating error, that's for sure