Grandalf, Wise Mentor

+3: Target creature gets +3/+3 until the start of your next turn.
-1: Untap target creature. Target creature cannot be tapped again for any reason until the start of your next turn. Target creature may still block.
-20: Exile Grandalf. Enemy creatures get -1/-1, enemy Planeswalkers get -3/-3 and allied creatures are untapped and get +5/+5 for this turn.