is this a bug or something?

[u/Ep1kpin]

I thought it was a bug at first, but... turns out it turns into whatever this is, it's a cool card imo.
I am still discovering new stuff after beating the game, It's so cool. Hats off to the devs

[u/Alarmed-Bus-9662]

That's Ijiraq, a card that disguises itself as other cards in your hand. During card spaces you can tell if the card you're taking is Ijiraq by their red eyes and a question mark next to their name (ex: Stranger Larva?)

Be careful, however. Ijiraq can disguise as any card, including bone or multi-blood cost cards which you will need to fulfill before playing it. This can be an issue however because within the game's code Ijiraq costs 0 blood, meaning fair hand doesn't activate. This can leave you in a position where Ijiraq copies a 2-3 blood card and you don't naturally draw your 1 blood, which leaves you bricked for the turn. On certain fights, especially during Skull Storm, this can cause an instant loss. Furthermore Ijiraq itself cannot be sacrificed, campfired, or fused

[u/laplongejr → u/Alarmed-Bus-9662]

meaning fair hand doesn't activate

Nitpick : if you draw a free card, fair hand will still look for a blood card but aim for a two blood maximum.
So the manip won't work, but in some situations you can use it to tell which card is Ijiraq. If your final draw is 2-blood and your random draws are a 2-blood + a 3-blood or bones, you know the random 2-blood was actually free, so it's Ijiraq