Emotes are the only form of communication in battle or spectating. You can build your emote deck with 8 emotes and use them in battle.
To access emotes during battle, press on the chat bubble button on the top left corner of your hand and select the emote. The same chat bubble is found on the side of your screen when spectating. When used by an in-game player, an emote will make one sound along with a short animation that will last for a few seconds; when used by a spectator, a smaller emote will appear on a side but without the sound.
To access emotes in Clan Chat, press the smaller emote button to the left of the send message button and select the emote to send. Clanmates can hear the sound and see the animation by tapping on the emote sent in the Clan Chat.
When first starting the game, players get access to the 4 king emotes. Over time, players will be offered emote packs that contain 4 emotes to buy in the Shop for real money.