Mirth, Grinning Executioner

Partner with Fufboon, King of wit
Vigilance, Lifelink
When you cast Mirth, Grinning Executioner, deal
X damage, divided as you choose among any
number of targets, where X is equal to the
amount of mana spent to cast it.
{2}: Change the target of target spell or ability to
Mirth, Grinning Executioner