The ultra rarity combined with the condition sensitive nature of the trophy card is what helped make this a record beater. Specifically, it was the 1997-1998 Japanese Lizardon Mega Battle Pokemon Tournament event (the second one held) that offered the card, but has never been reprinted for future use
Having three of them is great to get your Blaze and Tri-Blaze Accelerators as soon as possible, but you could get away with two in your deck
Chart shows the price of Number 54: Lion Heart [1st Edition] BLC1-EN037 at the end of each month going back as long as we have tracked the item.
The six magical inks Amber, Amethyst, Emerald, Ruby, Sapphire, and Steel, were released in a mixed-up chaotic form, resulting in a mysterious flood which damaged the Great Illuminary. When storyborn or dreamborn glimmers encounter this mixed ink, they surge with a power that changes them, transforming them into floodborn glimmers
This means youre effectively attacking your opponent directly for 2500 attack
As mentioned before, and on every EX card, losing one of these powerhouses means that one loses more valuable prize cards than usual