Jormund, the Rigidified

Everlasting {4}{w}{w}{w}(You may cast this card for its
everlasting cost. If you do, it becomes an enchantment and
loses all other types.)

Each other creature is each of Jormund’s card types and loses all other card types.

{1}{u/b}, {t}: Surveil 2. Whenever one or more cards are put into your graveyard this way, if Jormund is a creature, each opponent mills a number of cards equal to twice the total mana value of the cards put into your graveyard.