With such a potent answer like Unholy Heat, most of the creatures and Planeswalkers are easily answered, so decks have to play a lower curve threat package to not trade big mana threats against a single Unholy Heat
There is no desktop equivalent of the app , though
Illustrated by Stella Spente Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp
By comparison, a card of the same sort graded 10 by Beckett or PSA can go for almost $7,000
If a seller has a strict "no returns, no exceptions" policy, you should be cautious
These reprints are also valuable for Commander and Modern players, potentially impacting the secondary market for these staples