Infinity is a unique and incredibly powerful ability that allows an afflicted to keep their spells and magical abilities active until they themselves chooses to dispel them. That said, it is very likely that any magical effect they incite will live on, even after the caster dies, should they fail to undo it at that point. No matter how powerful the spell, the user only needs to cast it once for their power to take effect.
It is extremely versatile and can be used in numerous ways to make spells everlasting, including freezing others in ice eternally, causing flames to burn endlessly, or even stopping their own time. It allows them to escape the effects of powers which alter their time or age.
Through an enchantment, the afflicted can also apply Infinity to a spell to continuously channel magical power to it, making it exponentially more powerful.