Turn it face up any time for its mana cost if it's a creature card.) You can't sacrifice Disturbing Mirth unless another effect allows you to
This allows you to go to combat without thinking about blocks, which is nice, but the high mana cost of this card is not great
There are a couple other theories floating around though
In a Two-Headed Giant game, life gained by your teammate won't cause MJ, Rising Star's ability to trigger, even though it caused your team's life total to increase
Okay, I might have accidentally called myself out, but hey stax is always a legitimate strategy in Magic: The Gathering
Lich Lord of Unx and Geth, Lord of the Vault are two options that will spiral out of control in an instant, especially in tandem with Undead Alchemist