The Skill Point items is a direct-consumable item that adds Skill Points to your Skill Point stack. It is not an item that the player choose to use from the inventory.
The Skill Point item can be found in Upgrade Deals when buying VIP subscriptions, in special Loot Chests and as rewards during events. It is also rewarded as a Daily Challenge when defeating the Boss Battle
The Skill Point can be used to upgrade the Heroes skills.
By default without any levels of VIP the player can regenerate up to 10 skill points. Beyond the 10 Skill Points the player either needs a Level 5 VIP, or find other sources to stack more Skill Points.
Currently the only farming location is by defeating the Boss Battle which earns the player 5