For each stack of God-King's Rule, your followers gain +1 temp HP at the end of a long rest (maximum of 30). For every 100 stacks, The attack and damage rolls of your followers increase by +1 (maximum of +5). For every 1,000 of your followers you gain a +1 to attack and damage rolls (maximum of +5). For every 10,000 stacks, you and your followers gain a +1 to all stats (maximum of +2).
30 temp HP / long rest
Damage +5
Attack +5
All stats +1