When this creature becomes untapped or you lose control of this creature, exile that creature
This card already copies itself thanks to the storm keyword , and so long as you've chained a few cantrips together beforehand, Elemental Eruption will give you an army of 4/4 flying Dragon Elementals that get bigger with every non-creature spell cast
For example, if an Elite Inquisitor (a 2/2 with first strike) blocks a Grizzly Bear (a 2/2 with no abilities), the Inquisitor deals damage before the Bear can, so the Bears dies and the Inquisitor survives 3 Vigilance Vigilance is the ability to attack without tapping
Galvanic Iteration only costs two mana, which lets you cast it easily while ensuring you have enough mana for the actual spell you want to cast and copy
It's definitely a more challenging build for me because Faeries aren't really combat-based, which tends to be my favorite win condition