Vintage legendary gold star pokemon cards specifically the Legendary Beasts (Entei, Raikou, Suicune) and the Eon Duo (Latias, Latios)are among the most valuable and chased cards in the entire hobby
It doesn't have to be a basic land
Known in older formats as one of the best creatures to tutor for with Tinker, it's a beefy islandwalker that's here to end the game
That makes this an incredibly easy thing to achieve, and five mana for an 8/8 with flying and lifelink is a pretty good rate for sure
The last Un-set type to make the jump is a bit lesser-known, but no less important
The biggest plus about playing Serena is the fact we can discard copies of Archeops from our hand and get them into the discard pile so that when we use Lugias VSTAR ability, we can bench two targets instead of just one