Ikoria: Lair of Behemoths

Cubwarden | Creature | Cat | Mutate {2}{W}{W} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.) Lifelink Whenever this creature mutates, create two 1/1 white Cat creature tokens with lifelink. | Kekai Kotaki

Drannith Magistrate | Creature | Human Wizard | Your opponents can't cast spells from anywhere other than their hands. | Kieran Yanner

Lavabrink Venturer | Creature | Human Soldier | As Lavabrink Venturer enters the battlefield, choose odd or even. (Zero is even.) Lavabrink Venturer has protection from each mana value of the chosen quality. | Zoltan Boros

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

Mythos of Nethroi | Instant | | Destroy target nonland permanent if it's a creature or if {G}{W} was spent to cast this spell. | Seb McKinnon

Mythos of Vadrok | Sorcery | | Mythos of Vadrok deals 5 damage divided as you choose among any number of target creatures and/or planeswalkers. If {W}{U} was spent to cast this spell, until your next turn, those permanents can't attack or block and their activated abilities can't be activated. | Seb McKinnon

Skycat Sovereign | Creature | Elemental Cat | Flying Skycat Sovereign gets +1/+1 for each other creature you control with flying. {2}{W}{U}: Create a 1/1 white Cat Bird creature token with flying. | Slawomir Maniak

Yorion, Sky Nomad | Legendary Creature | Bird Serpent | Companion — Your starting deck contains at least twenty cards more than the minimum deck size. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} any time you could cast a sorcery.) Flying When Yorion enters the battlefield, exile any number of other nonland permanents you own and control. Return those cards to the battlefield at the beginning of the next end step. | Steven Belledin

Lurrus of the Dream-Den | Legendary Creature | Cat Nightmare | Companion — Each permanent card in your starting deck has mana value 2 or less. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} any time you could cast a sorcery.) Lifelink During each of your turns, you may cast one permanent spell with mana value 2 or less from your graveyard. | Slawomir Maniak

Zirda, the Dawnwaker | Legendary Creature | Elemental Fox | Companion — Each permanent card in your starting deck has an activated ability. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} any time you could cast a sorcery.) Abilities you activate that aren't mana abilities cost {2} less to activate. This effect can't reduce the mana in that cost to less than one mana. {1}, {T}: Target creature can't block this turn. | Jesper Ejsing

Frondland Felidar | Creature | Cat Beast | Vigilance Creatures you control with vigilance have "{1}, {T}: Tap target creature." | Steve Prescott

Kaheera, the Orphanguard | Legendary Creature | Cat Beast | Companion — Each creature card in your starting deck is a Cat, Elemental, Nightmare, Dinosaur, or Beast card. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} any time you could cast a sorcery.) Vigilance Each other creature you control that's a Cat, Elemental, Nightmare, Dinosaur, or Beast gets +1/+1 and has vigilance. | Ryan Pancoast

Jegantha, the Wellspring | Legendary Creature | Elemental Elk | Companion — No card in your starting deck has more than one of the same mana symbol in its mana cost. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} any time you could cast a sorcery.) {T}: Add {W}{U}{B}{R}{G}. This mana can't be spent to pay generic mana costs. | Chris Rahn

Inspired Ultimatum | Sorcery | | Target player gains 5 life, Inspired Ultimatum deals 5 damage to any target, then you draw five cards. | Tyler Jacobson

Whirlwind of Thought | Enchantment | | Whenever you cast a noncreature spell, draw a card. | Bram Sels

Offspring's Revenge | Enchantment | | At the beginning of combat on your turn, exile target red, white, or black creature card from your graveyard. Create a token that's a copy of that card, except it's 1/1. It gains haste until your next turn. | Daarken

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

Death's Oasis | Enchantment | | Whenever a nontoken creature you control dies, mill two cards. Then return a creature card with lesser mana value than the creature that died from your graveyard to your hand. {1}, Sacrifice Death's Oasis: You gain life equal to the highest mana value among creatures you control. | Grzegorz Rutkowski

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

Indatha Triome | Land | Plains Swamp Forest | ({T}: Add {W}, {B}, or {G}.) Indatha Triome enters the battlefield tapped. Cycling {3} ({3}, Discard this card: Draw a card.) | Noah Bradley

Raugrin Triome | Land | Island Mountain Plains | ({T}: Add {U}, {R}, or {W}.) Raugrin Triome enters the battlefield tapped. Cycling {3} ({3}, Discard this card: Draw a card.) | Jonas De Ro

Savai Triome | Land | Mountain Plains Swamp | ({T}: Add {R}, {W}, or {B}.) Savai Triome enters the battlefield tapped. Cycling {3} ({3}, Discard this card: Draw a card.) | Titus Lunter