I Can Cast Forbidden Spells Without Limit

An otherworldly dimension descends upon Blue Star, and a second sun appears in the sky. The gates to other planes open, and the entire human world becomes digitized. Yi Shen transmigrates here, only to discover a special Mage's Heart in his talent slot! 【Mage's Heart】 【Effect 1: Skills you cast consume no mana】 【Effect 2: Skills you cast have no cooldown】 【Effect 3: Multicast, allowing you to gather the energy for multiple spells at once】 【Effect 4: …】 If that's the case, then it makes sense that I can cast forbidden spells infinitely, right?