Martin Septim, Last Heir

Vigilance, Lifelink, Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

Shrines you control have Exalted and "Whenever this card is tapped, reduce the
cost of your next spell by {1}."

At the beginning of each player's combat step,
if you control the Amulet of Kings and that player controls a God or 10 or more creatures, transform Martin Septim,
Last Heir.