Ikoria: Lair of Behemoths

Mythos of Snapdax | Sorcery | | Each player chooses an artifact, a creature, an enchantment, and a planeswalker from among the nonland permanents they control, then sacrifices the rest. If {B}{R} was spent to cast this spell, you choose the permanents for each player instead. | Seb McKinnon

Call of the Death-Dweller | Sorcery | | Return up to two target creature cards with total mana value 3 or less from your graveyard to the battlefield. Put a deathtouch counter on either of them. Then put a menace counter on either of them. | Vincent Proce

Extinction Event | Sorcery | | Choose odd or even. Exile each creature with mana value of the chosen quality. (Zero is even.) | Filip Burburan

Memory Leak | Sorcery | | Target opponent reveals their hand. You choose a nonland card from that player's graveyard or hand and exile it. Cycling {1} ({1}, Discard this card: Draw a card.) | Karl Kopinski

Mutual Destruction | Sorcery | | This spell has flash as long as you control a permanent with flash. As an additional cost to cast this spell, sacrifice a creature. Destroy target creature. | PINDURSKI

Unbreakable Bond | Sorcery | | Return target creature card from your graveyard to the battlefield with a lifelink counter on it. | Randy Vargas

Mythos of Brokkos | Sorcery | | If {U}{B} was spent to cast this spell, search your library for a card, put that card into your graveyard, then shuffle. Return up to two permanent cards from your graveyard to your hand. | Seb McKinnon

Ruinous Ultimatum | Sorcery | | Destroy all nonland permanents your opponents control. | Chase Stone

Eerie Ultimatum | Sorcery | | Return any number of permanent cards with different names from your graveyard to the battlefield. | Jason A. Engle

Emergent Ultimatum | Sorcery | | Search your library for up to three monocolored cards with different names and exile them. An opponent chooses one of those cards. Shuffle that card into your library. You may cast the other cards without paying their mana costs. Exile Emergent Ultimatum. | Zack Stella