For the same mana cost youd probably rather sleeve up a creature with burn as an activated ability, or perhaps firebreathing
Then, with your creatures safely in play, they all gain trample, preventing your opponents from simply blocking them with a small 1/1 creature
The average price is more volatile and will go up and down more when the most expensive cards increase or decrease in price
It is much less reliable for final rules MTGPress proxy printing became popular because it solved a very specific Magic problem: players wanted a fast way to turn a decklist into printable proxy TLDR Fan-made Magic cards feel real when they follow the same invisible rules that make official cards readable, balanced, and playable
Horizon Explorer and The Wandering Minstrel We have these two awesome Green rare bodies with the ability for
If you choose not to copy the spell, no opponent can copy the spell and it resolves as normal