Yes, Mega Venusaur EX with a Lefa Cape is not KOd, but Hydreigon is weak to Grass anyway, and still, taking out 260 HP does cripple Mega Venusaur since losing it wins you the game altogether
I ended up having my heroes die due to my threat increasing and being attacked by the troll without strong enough defense
Combined with an artificial, printed-on holo pattern and noticeably blurry text, this fake is clearly a low-resolution scan
Cards like Wound Reflection and other amplifications cards will help to get you the win, and considering the card advantage Kefka gives, you can run combo wins pretty reliably
Vivi Ornitier does so much for so little
It might not sound like much, but starting a game with 3 extra cards in hand is a big boon, as it gives Sefina lots of options in the early stage of the scenario and allows her to set up more quickly in a game where you have a limited amount of turns to win