Silver-Tongued Prophet

{w}: Target Acolyte gets +1/+1 until end of turn. Use this ability only once per turn.
{b}: Target Acolyte gets -1/-1 until end of turn. Use this ability only once per turn.
{t}: Tap all Acolytes. Silver-Tongued Prophet does not untap during your next untap phase.
Beware his words.