As Katerina of Myra's Marvels enters, choose a letter. Whenever you cast a spell whose name begins with the chosen letter, create a white 2/2 Cat creature token with flying. Partner (You can have two commanders if they both have partner.)

{T}: Add one mana of any color in your commander's color identity.

({T}: Add {W} or {B}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

Hall of the Bandit Lord enters tapped. {T}, Pay 3 life: Add {C}. If that mana is spent on a creature spell, it gains haste.

This land enters tapped unless you control a Plains or a Swamp. {T}: Add {W} or {B}.

{T}: Add {C}. {2}, {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

({T}: Add {W}.)

({T}: Add {W} or {B}.) This land enters tapped. When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

As this land enters, you may reveal a Plains or Swamp card from your hand. If you don't, this land enters tapped. {T}: Add {W} or {B}.

({T}: Add {B}.)

This land enters tapped. When this land enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.) {T}: Add {W} or {B}.

{T}: Add {C}{C}. Activate only if you control five or more lands.

Flying, lifelink When this creature enters, return target permanent card with mana value 4 or less from your graveyard to the battlefield. Encore {6}{W}{W} ({6}{W}{W}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

Whenever a creature is put into your graveyard from the battlefield, you may sacrifice this enchantment. If you do, return that card to the battlefield.

Whenever you gain life, put a +1/+1 counter on this creature.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Flying, double strike Whenever a creature you control deals combat damage to a player, you and that player each gain that much life. At the beginning of your end step, if you have at least 15 life more than your starting life total, each player this creature attacked this turn loses the game.

Flying If you would gain life, you gain that much life plus 1 instead. This creature gets +2/+2 as long as you have 25 or more life.

Whenever a player casts a white spell, you may gain 1 life.

Whenever a creature you control enters, you gain life equal to its toughness.

Flying At the beginning of each combat, choose first strike, vigilance, or lifelink. Creatures you control gain that ability until end of turn.

Flying Lifelink (Damage dealt by this creature also causes you to gain that much life.) Whenever you gain life, put a +1/+1 counter on each creature you control.

Flying Landfall — Whenever a land you control enters, you may exile target nonland permanent other than this creature. When this creature leaves the battlefield, return all cards exiled with it to the battlefield under their owners' control.

Flying Whenever this creature enters or deals combat damage to a player, exile up to one target nonland permanent. For as long as that card remains exiled, its owner may cast it. Whenever another player casts a spell from anywhere other than their hand, draw a card.

+2: You gain 2 life. Put two +1/+1 counters on up to one target creature. −3: Exile target creature. Its controller gains 2 life. −10: Creatures you control gain flying and double strike until end of turn.

+1: You gain life equal to the number of creatures you control plus the number of planeswalkers you control. −2: Create a 2/2 white Cat Soldier creature token named Ajani's Pridemate with "Whenever you gain life, put a +1/+1 counter on this token." 0: If you have at least 15 life more than your starting life total, exile Ajani and each artifact and creature your opponents control.

Flying When this creature enters, you may exile target nonland permanent an opponent controls until this creature leaves the battlefield. Embalm {5}{W} ({5}{W}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a white Zombie Angel with no mana cost. Embalm only as a sorcery.)

Flying When this creature enters, you may exile up to three other target creatures from the battlefield and/or creature cards from graveyards. When this creature leaves the battlefield, return the exiled cards to their owners' hands.

Flash Flying When this creature enters, if you cast it from your hand, exile all attacking creatures.

Flying When this creature enters, exile up to two target artifacts and/or enchantments. Plainscycling {2} ({2}, Discard this card: Search your library for a Plains card, reveal it, put it into your hand, then shuffle.)

Exile target creature or planeswalker. Its controller creates a 4/4 white Angel creature token with flying.

Exile target creature or enchantment.

As an additional cost to cast this spell, sacrifice a permanent. Exile target artifact, creature, or enchantment.

Exile target nonland permanent. You lose 3 life.

Destroy target permanent. Its controller creates a 3/3 green Elephant creature token.

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

+1: You gain 2 life. −1: Put a +1/+1 counter on each creature you control. Those creatures gain vigilance until end of turn. −6: Create a white Avatar creature token. It has "This token's power and toughness are each equal to your life total."

+1: Until end of turn, up to one target creature gets +1/+1 and gains first strike, vigilance, and lifelink. −2: Put a +1/+1 counter on each creature you control and a loyalty counter on each other planeswalker you control. −7: You get an emblem with "If a source would deal damage to you or a planeswalker you control, prevent all but 1 of that damage."

+1: Put a +1/+1 counter on up to one target creature. −3: Target creature gains flying and double strike until end of turn. −8: Create X 2/2 white Cat creature tokens, where X is your life total.

Flying (This creature can't be blocked except by creatures with flying or reach.) When this creature enters, another target permanent gains indestructible for as long as you control this creature. (Effects that say "destroy" don't destroy it. A creature with indestructible can't be destroyed by damage.)

Flash Flying When this creature enters, until end of turn, damage that would reduce your life total to less than 1 reduces it to 1 instead. {4}{W}{W}, Exile this card from your graveyard: Your life total becomes 10.

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.) You can't lose the game this turn and your opponents can't win the game this turn. Until end of turn, damage that would reduce your life total to less than 1 reduces it to 1 instead.

Target creature or planeswalker you control gains protection from colorless or from the color of your choice until end of turn. If it's a creature, put a +1/+1 counter on it. (It can't be blocked, targeted, dealt damage, enchanted, or equipped by anything with that quality.)

Prevent all combat damage that would be dealt this turn. Cycling {2} ({2}, Discard this card: Draw a card.)

Flying As long as this creature is untapped, creatures can't attack you or planeswalkers you control unless their controller pays {1} for each of those creatures. As long as this creature is attacking, creatures can't block unless their controller pays {1} for each of those creatures.

Flying, vigilance, indestructible Other permanents you control have indestructible.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.) Equip {0}

Flying Other nonblack creatures you control get +1/+1. Players can't pay life or sacrifice creatures to cast spells or activate abilities.

Flying Each opponent who cast a spell this turn can't attack with creatures. Each opponent who attacked with a creature this turn can't cast spells.

Other Cats you control get +1/+1. Whenever Arahbo or another nontoken Cat you control enters, create a 1/1 white Cat creature token.

Flying, first strike, vigilance, trample At the beginning of each combat, until end of turn, each other creature you control gets +1/+1 if it has flying, +1/+1 if it has first strike, and so on for double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, protection, reach, trample, vigilance, and partner. Partner

Emerge {5}{W} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.) When this creature enters, create a 2/2 white Alien creature token. If this creature's emerge cost was paid, instead create X of those tokens, where X is the sacrificed creature's toughness.

Double strike Eternalize {3}{W}{W} ({3}{W}{W}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie Cat with no mana cost. Eternalize only as a sorcery.)

At the beginning of each end step, if you gained 4 or more life this turn, create a 4/4 white Angel creature token with flying.

Flying, vigilance Whenever this creature or another nontoken creature you control enters, create a 1/1 red Mercenary creature token with "{T}: Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery." Whenever this creature attacks, if its power is 6 or greater, draw a card.

Flying, protection from artifacts

Flying Whenever this Vehicle attacks, if defending player controls more lands than you, search your library for a basic Plains card, put it onto the battlefield tapped, then shuffle. Crew 2

{T}: Add one mana of any color in your commander's color identity.

White spells you cast cost {1} less to cast.

{T}: Add {C}{C}.

Search your library for a card, put that card into your hand, then shuffle.

Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.