Return (retire) a hero to the Kingdom and it joins the Hall of Fame. The heroes listed there passively generate Gold and Honor every 10 minutes, scaling with each returned hero's level and grade (up to the hall's capacity). Returning heroes is also how you earn fame: the more heroes you retire, and the higher their grade, the more total fame you build, climbing the rank tiers below.
BronzeI1,500II3,500III6,500IV12,500V21,500VI33,500
SilverI48,500II68,500III93,500IV123,500V158,500VI198,500
GoldI243,500II293,500III348,500IV408,500V473,500VI543,500
MasterI618,500II698,500III783,500IV873,500V973,500VI1,083,500
GrandI1,203,500II1,333,500III1,473,500IV1,623,500V1,783,500VI1,953,500
RedI2,133,500II2,328,500III2,538,500IV2,763,500V3,003,500VI3,258,500
GreenI3,528,500II3,828,500III4,158,500IV4,518,500V4,908,500VI5,328,500
BlueI5,778,500II6,278,500III6,828,500IV7,428,500V8,078,500VI8,778,500
BlackI9,528,500II10,358,500III11,268,500IV12,258,500V13,328,500VI14,478,500
Black & WhiteI15,708,500II17,108,500III18,698,500IV20,498,500V22,528,500VI24,808,500
WhiteI27,358,500II30,258,500III33,658,500IV37,758,500V42,758,500VI48,758,500