In faster formats, that swing matters a lot
If you have a way to dump that mana into a win condition, it's possible to win the game off of this combo
(2018-03-16) If the triggered ability divides damage or distributes counters among a number of targets (for example, the ability of Bogardan Hellkite), the division and number of targets can't be changed
If an effect exiles Summon: Esper Maduin and then instructs you to return it to the battlefield, it remains face up in exile (unless that effect instructs you to put it onto the battlefield transformed, in which case it returns as Summon: Esper Maduin)
MTR 3.4 defines proxy cards as something a Head Judge creates, not something you bring from home
Starter decks are meant for beginners after all