I disagree for farm round, if you can stay on the max wave with mob speed and mini boss activated you can beat you'll make billions of gold (depending on how far you are ofc)
So, to actually rebirth, you need to click the green "rebirth" button twice, then you'll reset and gain the accumulated tokens to spend
@AaronW76 there's a pretty big gap between each mega boss, you'll need much more dmg. For finger to do dmg you need more than it's armor. As for the circle thingy, that's just how the boss is, idk what sort of creature it's supposed to be ^^
@Methenas, the rebirth coins that dropped are stored until you rebirth, it resets everything except at least red gems bought with blue ones (not sure if it resets inventory/accessory size up) then you can spend them.
I did a first early-ish rebirth to get a few buffs now i'm saving for a big one (maybe)
 "Idle Wizard"){kind=icon}
 "Incremental Cubes"){kind=icon}
 "Grow Defense"){kind=icon}