Bloodrush - G, Discard Slaughterhorn: Target attacking creature gets +3/+2 until end of turn.
The orzhov clergy would never cross its path, but sending thrull couriers to do so is cheap and entertaining.
3/2
MYTHICSPOILER.COM THE CYCLICAL MTG SPOILER
MythicSpoiler is a dedicated visual spoiler, designed to let you EXPLORE, DISCOVER and EXPERIENCE new Magic the Gathering sets in a simple, sortable gallery.
AMONKHET
AETHER REVOLT
KALADESH 
COMMANDER 2016
MORE SETS
