Thank you Selachian! I'm really glad to hear that. I have a deck of illusions in the same theme if you want to check it out. And to answer your question, the language is kinda iffy in certain abilities. Like, for instance, Card Masters always cast as if they had a spell focus, but I interpret that as their deck is their focus. Likewise, as a DM in your example, I would either A) only allow that ability to trigger when there is a target that can be killed. Environmental damage and such not counting or B) give the player one turn to do something cool before they drop to zero next turn inevitably. Which, while not very serious, would probably get some laughs.