Guardian of the Tomb

Changeling (This card is every creature type.)
Whenever a player casts an adventure spell, put a +1/+1 counter on Guardian of the Tomb.
Creatures can't be cast from exile. This creature has all keywords of all creatures in exile.
"I heard stories of adventurer's who strayed from their quest in pursuit of priceless valuables in the tombs only to never be heard from again." - townsfolk