Play this if you have a "Hydragrum" vanguard!
Choose one of your (RC) without any Dragontree markers, put a Dragontree marker, choose one of your units being attacked, and it gets [Power] +10000 until end of that battle. If you have a vanguard with "Griphogila" in its card name, it gets [Power] +20000 instead of +10000.