While Lightning doesn't have quite the same support as Water at the moment, namely a card like Archie's Ace in the Hole to get him out as early as Turn 1, Magnezone is a card that begs experimentation in order to take advantage of its potentially game-breaking ability
Technically, blue has no shortage of counterspells to deny your opponents their favorite creatures
If you have a way to grant your creatures Flash, like High Fae Trickster, you can loop zero-mana creatures like Ornithopter for infinite enters/leaves triggers
while it may be preferable to not have a Baron in your deck, sometimes you need a card that can just actively engage in a kill
With vigilance, it can attack or block and still provide mana
Adding Threats On the flip side, you can also use your sideboard to find a new threat that your opponent will struggle with