Exotic Upgrade Tree 21

All upgrades are multiplicative unless stated otherwise.

Icon	Name	Increases	Base cost	Effect per level	Base level requirement
	Raining gold	Gold earnings	1920	35%	411
	All main attributes	Main attributes of all heroes and guardians	1920	30%	411
	Guardian power	Damage of all guardians	480	35%	412
	Firestone effect	Firestone effect	1320	30%*	412
	Heroes' damage	Damage of all heroes	960	35%	413
	Attribute health	Health of all heroes	960	35%	413
	Attribute armor	Armor of all heroes	960	35%	414
	Prestigious	Firestones earned after prestige	1920	30%	414
	Skip stage 8600–8800	Chance to skip a stage between 8600 and 8800	240	1%*	415
	Skip wave 8600–8800	Chance to skip a wave between 8600 and 8800	240	1%*	415
	Skip stage 8800–9000	Chance to skip a stage between 8800 and 9000	240	1%*	416
	Skip wave 8800–9000	Chance to skip a wave between 8800 and 9000	240	1%*	416

* additive effect

The total cost to finish tree 21 is 680,640 exotic coins.

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