Regenerating Doctor

•Changeling (This card is every creature type.)
•As Regenerating Doctor enters the battlefield,
choose a creature type.
•Spells of the chosen type you cast cost
{w}{u}{b}{r}{g} less to cast. This effect reduces
only the amount of colored mana you pay.
{bull}Other creatures you control of the chosen type
get +1/+1.
—
Morophon, the Boundless