Vogen Mournborn

Menace
You may exert Vogen, Mournborn as he attacks.
When you do, he gains +3/+0 until end of turn.
(He won't untap during your next untap step.)
Whenever you exert a creature, you may pay {r/w}{w/b}, when you do, that creature gains +2/0 until
end of turn.