Mulligan You want a starting hand with some low-cost characters for turns 1 and 2, and ideally a few Heros and Hero-buffing cards
The single-player challenges are designed purely to help players understand how the games elemental system works - which is similar to that of the Pokmon video game series - and give them a chance to use various cards found in the wider game, which is great for helping to develop your sense of play and on-the-spot thinking
Unlike Stone Fighting Energy, however, the damage reduction of V Guard Energy doesnt stack with additional copies of V Guard Energy attached to the same Pokmon
Being an instant lets you mess with Thassa's Oracle and Underworld Breach, and you can even threaten it as a rattlesnake: After you cast this and ruin the reanimator players plan, who wants to interact with their graveyard with this face-up, ready with flashback
If your Pokmon is attacked by a Pokmon Type that its weak to, it will take double damage