Alarielle's new Lifebloom self-resurrect can only be attempted once per battle, correct? Or is it only able to succeed once per battle? The former makes it makes it a really swingy mechanic.
Relevant text:
"In addition, once per battle, at the end of your hero phase, if this unit has been destroyed, you can roll a dice and add the number of the current battle round to the roll. On a 6+, you can set up this unit on the battlefield wholly within 12" of an overgrown terrain feature, yadda yadda..."