1v1 hero arena on The Crossing: lane creeps march and fight on their own — you play the heroes. Kills pay gold, the jungle camps pay XP, and the match ends when a stronghold falls.
Up to 3 heroes per side: the second costs 700 gold, the third 1750. Hire them at your stronghold; fallen heroes respawn at the fountain for free.
Or duel a friend online — host a Duel of the Altars room