Sonorous Prophet

Hexproof
Whenever Sonorous Prophet attacks Pry 1. You may have target player draw a card and reveal it, then Sonorous Prophet deals damage equal to its mana value to target creature. Marked creatures take double damage. (Pry = scry your opponent.)
{2}{w}{b}: Mark Target creature. (Marked creatures can be attacked by creatures with Marked Attack until your next upkeep.)