Show alert message to you and write message in the chat when your amount of mana is less then needed value (%). Needed value can be set in the WA user-settings (by default it's 10%). Also it's possible to set throttle value which prevent you from spamming messages to chat. E.g. when you mana level is "jumping" from 8% to 12% you won't write message any time when value of 10% is riched. By default next message can appear only when 10s are passed after previous one.
