"TIL that one of the rarest Yu-Gi-Oh cards in existence is Tyler the Great Warrior. It was created by Tyler Gressle, a boy that had a rare form of liver cancer. He got to create his own card through Make-A-Wish Foundation and they printed one card just for him. He made a full recovery."
from Wikipedia
Amount of elements by percentage
Part examined
Copper Tin Lead Iron Sulfur Arsenic
Blade 80.3 18.8 0.4 0.4 trace trace
Yellow pattern 83.1 15.2 0.8 0.8 trace trace
Dark pattern 73.9 22.8 1.4 1.8 trace trace
Darkest regions 68.2 29.1 0.9 1.2 0.5 trace
Edge 57.3 29.6 8.7 3.4 0.9 trace
Central ridge 41.5 42.6 6.1 3.7 5.9 trace