When your opponent summons 5 monsters in a single turn, you can send all their monsters to the graveyard to summon Nibiru to your field, and a token to their field
Its described as patient but powerful, with mechanics that reward timing, control, and overwhelming force once everythings in place
The list of appealing legendary creatures in Standard is already so long just look at all the ones we found in mono-green alone and with lots of Kaldheim previews coming our way, the list will only grow from here
Both Mystical Archive treatments of the card also feature new art that displays the card in ways it hasn't really been showcased before, so it will help players have the kind of art they want in a card that's ubiquitous in MTG
This makes it so creatures that took a mana investment have to be made again
The reason it sees play in competitive lists is because it trades tit-for-tat with other 1-mana creatures without overcharging, due to its specific wording