You remove a +1/+1 counter to gain 2 life and that instance of life gain causes Archangel of Thune to put a +1/+1 counter back onto Spike Feeder
It is a Fire card illustrated by PLANETA Igarashi
At the bottom right of every Pokmon card is the label 'Retreat Cost.' In exchange for discarding a set amount of Energy, retreating allows your Pokmon to move back to the bench, usually to avoid a knockout or to let a different Pokmon start attacking
Remember, you may be holding these boxes for a few years and it is still possible for the value of what you buy to decline rather than go up, but that tends to be more the exception than the rule with these sales
I cast Lotus Petal, play Ancient Tomb and cast Show and Tell
However, the limited availability of these promos could also lead to imbalance, as not all players may have access to them