Alumi, Goddess of Fables

Trample, lifelink, haste
Alumi, Goddess of Fables gets +1/+1 for each other legendary permanent you control.
whenever you discard Alumi, shuffle it into its
owner's library.
Channel —{x}{r}{g}{w}, discard Alumi: Search your library for a legendary permanent with mana value
X or less, put it onto the battlefield, then shuffle.