Dawnstorm Token

s are quest rewards from Vanguard Initiative for killing high level monsters in Island of Dawn. This is current highest of 3 different Island of Dawn tokens that include also Underdawn and Dawnfall Tokens for lower difficulty monsters.

Quests were originally repeatable once per day, but are now repeatable as long you have Vanguard Requests left (16 per day). It's possible to farm Nagas only, since those are slightly easier than other monsters. Each quest gives 12 tokens:

Once you have gathered Dawnstorm Tokens you can turn them in for various items by right clicking on the token which opens the Dawnstorm Exchange.