Summon Point is a special attribute of Hero NFTs.
Each Hero has a pre-set number of Summon Points when summoned.
Summon Points allow Heroes to be used in Summon Boost Up, alternating the Gacha rate to the player's preference, summoning more powerful Heroes.
Hero's Summon Point is deducted by 1 every time the Hero is used for Summon Boost Up.
At 0 Summon Point, the Hero can no longer be used for Summon Boost Up