If you paid the prototype cost of a spell on the stack, that card has a mana value associated with the prototype cost
We chose this card for its ability to both spread damage around your opponents Bench Pokmon and also deal devastating damage to their Active Pokmon, depending on which you prefer
This deck is begging to be tinkered with
Lastly, if youre running cards like From the Ashes and Demolition Field that allow your opponents to search for lands to replace what theyve lost, you can mess those up with a variety of effects like Opposition Agent and Aven Mindcensor that prevent them from searching for cards to remove the balancing aspect of those effects
if you assume, on average, you're drafting 31 playables for your deck (23 spells, 5 lands, 3 sideboard cards) then approximately 10% of your cube could potentially be strong sideboard cards and the resulting decks would be 'more powerful' than a cube with no sideboard cards