Rosz, Ingenious Naturalist

When Rosz enters, mill two cards, then you may
exile a creature card from your graveyard. If you
do, note one of that card's creature types. For
the rest of the game, creatures and creature
cards you own that aren't on the battlefield are
that type in addition to their other types.
Each non-Shapeshifter creature you control gets
+X/+X and has Ward X, where X is the number
of subtypes it has.