Once an item glimmer is played it remains in your playing field even after it has been exerted, with the only way for your opponent to banish it being through using abilities or other action cards
Tinker Bell Enchanteds have held similar values
The ink symbol is just below the classification or name, but most importantly, the characters name is always present over a bar of the ink colour
So a character card with an ink cost of 5 or more can sing Let It Go for free by exerting, without having to pay the Action cost of 5 ink
If you are capable of healing your cards, through items, actions, or character abilities, and Beast, Tragic Hero has damage on them at the start of your turn, you can let them attack and then heal them, allowing you to still benefit from the increased strength but keeping them healthy enough to stick around