Like most Pokmon cards, the value of Full Heal Energy depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Legendary Collection)
There could be a Red Treasure list featuring Goldspan Dragon, or adding Blue for Galazeth Prismari
I drafted the set a lot and had fun with multiple copies of Indulging Patrician closing out games with alarming speed
This can be before blockers are declared, after blockers are declared but before combat damage is dealt, during combat after combat damage is dealt, during the postcombat main phase, during the end step, or, in some unusual cases, during the cleanup step
This is pretty similar to the first argument, that youll draw your best cards less often, but it highlights that its even more likely that you have some cards that are wildly better than your other cards in post-sideboard games