Double post because important: Since this came to my attention with DANIEELA vs. Dragoon. Any negative ups count as upgrades for your opponent: so in this scenario, if Danieela can use -6 upgraded cards, and Dragoon can use -2, it is treated as DANIEELA using 2 ups, and Dragoon using 6, NOT DANIEELA using 0 and Dragoon using 4.