Eladrin

Eladrin are elves of the Feywild, a realm of perilous beauty and boundless magic. Using that magic, eladrin can step from one place to another in the blink of an eye, and each eladrin resonates with emotions captured in the Feywild in the form of seasons—affinities that affect the eladrin’s mood and appearance. An eladrin’s season can change, though some remain in one season.

From D&D Monsters of the Multiverse.

Feats specific to Eladrin

A feat represents a talent or an area of expertise that gives a character special capabilities. It embodies training, experience, and abilities beyond what a class provides.

At certain levels, your class gives you the Ability Score Improvement feature. Using the optional feats rule, you can forgo taking that feature to take a feat of your choice instead. You can take each feat only once, unless the feat’s description says otherwise.

You must meet any prerequisite specified in a feat to take that feat. If you ever lose a feat’s prerequisite, you can’t use that feat until you regain the prerequisite. For example, the Grappler feat requires you to have a Strength of 13 or higher. If your Strength is reduced below 13 somehow — perhaps by a withering curse — you can’t benefit from the Grappler feat until your Strength is restored.