You can only use each of the following effects of "Meklord Assembly" once per turn
While it hasnt been officially confirmed as the Headliner card for Final Fantasy, it looks like a likely candidate based on today
When its defeated, exile it, then cast it transformed.) When Invasion of Ikoria enters the battlefield, search your library and/or graveyard for a non-Human creature card with mana value X or less and put it onto the battlefield
Because of this, its important for a player to know exactly which cards to choose
logo on the cards' backings and set packaging (until Enemy of Justice), the region identifier "AE" in their Card Number (from Invasion of Chaos onwards), the usage of unedited artworks (from the Speed Start Decks onwards), and/or the stiffer OCG card stock
I also really like his interaction with other tokens