Crag, Master of Dungeons

Indestructible
As long as your party is not full, Crag, Master of Dungeons isn't a creature.
Whenever you roll one or more dice, add two
to the result for each creature in your party.
If you control a full party, spells you cast cost
{w}{u}{b}{r}{g} less to cast. This effect reduces
only the amount of colored mana you pay.