MarDose, Master of Beasts

Cannot be countered.
Haste, Trample, Flying,
Creature spells with power 4 or greater cannot be countered.
Creature spells with power 4 or greater cost {3} less to cast.
Whenever a creature with power 4 or greater enters the battlefield draw a card.
{2}{u}{r}: Gain control of target creature with power 4 or greater.
If MarDose would leave the battlefield Exile him. You may cast MarDose from Exile