
People are so locked into the “action mathematics” cost of a card. This card’s utility comes not from getting an extra action, but from the fact that the action you are getting is for any player and is out of turn. I will not argue this is an amazing card, but it certainly has merit.
We play 4 player on hard, and our highest success rate runs are where purple plays support, dragging as many of the bad tokens out of the bag as possible. They will do other stuff, because purple is so flexible, but they are not the primary cluever, or the primary fighter, or primary dodger. This type of character would love this card.
An extra, clutch turn at the right moment is amazing. Oops, our dodger just moved, engaged and then drew tentacles against the massive endboss. That’s 4 big attacks against the team. But wait, enter Blood of Thoth. An extra dodge attempt here is worth much, much more than a card, 2 resources and an accessory slot.
The action is also out of turn. There is a player window after the enemies move. A hunter enters your area – Blood of Thoth fast action – someone kills it or dodges it before it gets to attack.
Or as a big turn combo card; an extra action for the player having a Payday, The Stygian Eye or Will to Survive round.
If it’s 3 or 4 multiplayer, and you were already building a doom deck (which raises its own question marks), adding this card seems viable.
I wonder if moving blood from another card to Sin-Eater counts as “1 or more doom being placed on a card you control”. If so, then this card will trigger more often.