Doc, of seven Dwarfs

Partner of seven dwarfs.(When this creature enters the battlefield, target player may put up to six creatures with seven dwarfs in the name into their hand from their library, then shuffle.)
Dwarf spells that you cast cost {w}{u}{b}{r}{g} less to cast. This effect reduces only the amount of collored mana you pay.
Dwarfs you control get +2/+2.