↑There is a glitch where you are allowed to chain cast as many bolts as your wand allows with the mana cost of 1 charge. For example, with a current MP of 1, you may chain cast rank F Icebolt up to 4 times without using additional mana.
↑When chain casting Icebolt, the MP cost of all charges will be based on the charge you are currently casting. For example, if you have chain casting +4 and you currently have no charges, you will pay the full mana cost for all five charges instead of each charge getting progressively cheaper.
↑If you have a wand with chain casting on it, you will always cast the number of charges equal to 1 + the wand's chain casting level. As long as the wand has chain casting and is the right element, you will always chain cast, there is no chance involved.