Colossus Hammer

Equipped creature gets +10/+10 and loses flying.
Equip {8} ({8}: Attach to target creature you control.
Equip only as a sorcery.)
"We all know what my brother would do. Robert
would gallop up to the gates of Winterfell alone, break
them with his warhammer, and ride through the
rubble to slay Roose Bolton with his left hand and the
Bastard with his right."
—Stannis Baratheon to Richard Horpe