The subject is the reward for defeating Hardened Peloponnesian War.

Makes it easier to spot the draft icon.

If you're interested this guide has a chapter called Hardened Levels that explains every level reward (and is overall a great guide for idle):
https://docs.google.com/document/d/1EHCM-n_4vq_Hv7V1wo9QSTcRP2ba4qRqBh8fOh5PiKk/mobilebasic