hatenna pokemon card price TCG: 083/192 Colorless Magical Shot (30) Weakness Darkness ×2 Resistance Fighting CCGHouse.com - Hatenna - 018/073

Its how cards are graded on their quality

Lay the suspect card next to a verified real copy of the same card or any authentic Magic card

however, that might be all you need if you drop it early enough in the game

Here, the 'cleanest' line of argument for plague themed cards being banned is: "MtG has plague themed cards, there is a current pandemic whihc is bigger than any other recent pandemic, I know somebody who died becuase of the pandemic, I'm angry at any reminder about the pandemic, ergo, I am angry at WotC for having cards which remind me of this." This is very clearly a stretch, as the same argument could be that the game in general depicts death and somebody might be upset about the death of a loved one (from a COVID unrelated issue)

Rowan makes cards that are already extremely strong such as Ad Nauseam and Bolas's Citadel EVEN STRONGER by making each drop of blood you pour into them discount your eventual game-winning spells, or even value pieces or tutors you might play along the way to secure your winning lines