Shame!) I will have to disagree with LSV in his set review here, the limitation of non-creature, non-land permanent makes this quite bad for a rare
Because Morophon itself is a Changeling, you can cheat it out with Sorin, Imperious Bloodlord, which can then cheat out The First Sliver
By putting three items from the discard at the bottom of the deck, you can get one lore for each one
Creating tokens that attack each player is fantastic in token aggrothats three creatures to buff, three Impact Tremors triggers
Vivi can easily net you an absurdly high manabase to unleash plenty of powerful spells
Although this ability only triggers when Mirri attacks, you'll undoubtedly be beefing her up with equipment, and first strike will deter opponents from blocking her