Its activated ability digs through an opponents library until it hits an instant, sorcery, or creature, and then it lets you cast that card for free
All of these promos come with a gold border and foil treatment
But Im also not a child (despite some evidence to the contrary), who perhaps has been anxiously awaiting this game for months and wants nothing more than Lorcana for Christmas
Sometimes these are controlled and others are not, but essentially the long-running theory is that every time Gilgamesh appears in a different Final Fantasy game, it's the same Gilgamesh, the one that originally hails from FFV
This guy made blue control decks virtually unplayable for a full year in Standard, until Tsabo's Decree finally saw print, mainly as a hoser for the Rebel deck fuelled by the Sergeant