We have several of these items' development already in progress
3v3 PvP Challenge the "Champion"
"The Pit": (Arena for Rank 1,2,3,4 and 5 troops)
Temple: (Sacrifice troops for gold)
Den: (Requires at least on Troop with 'Looter' attribute) = Steal from Barbarians
Tower: (Magical units can Craft or Summon... at low City Level, will be good for getting Potions, at higher level, good for getting Immortal Troops)
Barracks: = Raid Bosses (Group PvP)
Artifacts: (all kinds of effects)
Joust: (Send Riders to earn Gold without losing the troop except for accidental fatal wounds)
Chat room: using Chatango {earn bonus gold when hanging out}
Tavern: Leaderboards
Cove: PTC Ads for BTC/ETH
Market: Exchange Gold to ETH/BTC
Will add: Countdowns for the main Arena... starts at 3:00 AM EST (other arenas will be real time). Likely we will not have gold->iron and reverse since it is used as a key limiter in the game as far as making sure that NEW/FREE Players must actually play the game and grow in order to earn larger payouts, etc. Otherwise, free players would just cashout initial gold, and start new accounts etc.
Ally/Guild will be designed in the future. For now it is a great way to increase your City Max Population and get gold/iron and when you claim from the King, your allies get free Gold/Iron too
Thanks for the feedback!
IMO need more upgrade, like ally vs ally war, state vs state war, chat room;D, countdown arena, trade between gold to iron and reverse, trade market to trading iron and gold with eth.