Supposing you have as few as five cards in your hand, that's 20 damage straight to the dome
Shining Genesect likes to pick one color of energy, move it around a bunch, and use a metric ton of the stuff to pew pew things, like Basically every other Genesect card ever
The ultimate in-archetype boss monster, "Unchained Abomination", has three once-per-turn Trigger Effects that each destroy 1 card on the field: once if an on-field card is destroyed by another card's effect, once if a monster is destroyed by battle, and once during the End Phase
Just look at Charizard shooting out that fire, and there isnt a crease or a crinkle in sight
This effect should be crisp and uniform across the entire card
After you've attacked, you can exile and return a tapped creature to the battlefield on your end step with this background so it's ready to block on opponents turns