Could be some spicy anti-Moat tech, or just a way to ensure that your creatures can always block everything, while also avoiding Earthquake
The opportunity cost to include them in your deck is so low that it often makes no sense not to play them, outside of a few hyper-specific cases
This exclusivity, combined with its electrifying design and immense cultural cachet , cements its position as both a collectors trophy and a striking conversation piece
With this combo, you can instantly charge up Pokemon who struggle to amass the right energy otherwise
That means that if you exile Flickerwisp with Yorion, the wisp will return next end step exiling Yorion, which will then enter on the next end step exiling wisp, and repeat
That feeds into its second ability of generating energy when you deal damage with artifact creatures