Adding to the fact machine

Quote Originally Posted by 4Ak View Post
Gondorian (on official Wulven thread after revealing SF cards):

"Cards with a sustain cost show a cost that will be automatically paid at the end of their controller's turn. A 1HP cost means your hero takes 1 damage at the end of your turn.

If the cost can't be paid, the card with sustain is destroyed/killed. In the case of a 1HP cost, that's always going to be payable (and it might kill your hero). A 1cc cost means you need to leave a resource unspent at the end of your turn to pay it or the card with sustain goes away."

Mojumbo:

"The 1 health sustain cost on Confluence of Fate is a mandatory cost. It deals irreducible damage in the same way that mill damage you take from having an empty deck is irreducible. As such, Guardian of Unaxio will be unable to prevent the sustain cost damage with his ability."

...no bugs here, let's move on