Many Celebrations promos used older styles of cards with Pokmon that weren't around when they were active
Should a player no longer have any Pokmon left active or standing by, or should a player have six of their Pokmon faint in battle, then they lose the game and their opponent is named the winner
While the Extra Deck was only comprised of Fusion and Synchro Monsters at the time of the card's original Western release (it was released in 2001 in Japan, when only Fusion Monsters existed in what was then the Fusion Deck), in modern play the card could bring out a whole host of Xyz, Pendulum and Link Monsters with ease -- were it not for the card's errata
The return to Ixalan in 2023 gave them a lot of powerful new options, including the current (as of 2/1/24) top spot over on EDHREC
Additionally, lands that enter the battlefield tapped can slow down your game plan the more you lean on them but will often be easier on your budget
You can only use this effect of "Arisen Gaia the Fierce Knight" once per turn