You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for spells you cast.

{T}: Add three mana of any one color.

Whenever an opponent draws a card, you may pay {1}. If you do, draw a card.

Sacrifice a creature: Add one mana of any color.

Imprint — When this artifact enters, you may exile a nonland card from your hand. Spells you cast that share a card type with the exiled card cost {2} less to cast.

Prototype {1}{U}{U} — 2/1 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) When this creature enters, if you cast it, exile target instant or sorcery card with mana value less than or equal to this creature's power from your graveyard. Copy that card. You may cast the copy without paying its mana cost.

Vigilance, menace, lifelink Whenever Kroxa and Kunoros enters or attacks, you may exile five cards from your graveyard. When you do, return target creature card from your graveyard to the battlefield.

If you would draw a card while your library has no cards in it, you win the game instead.

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Flying This creature enters with a +1/+1 counter on it for each instant and sorcery card exiled with it. Whenever an instant or sorcery card leaves your graveyard, put a +1/+1 counter on this creature.

Trample Whenever a source deals damage to this creature, that source's controller sacrifices that many permanents of their choice.

Flying You can't lose the game and your opponents can't win the game.

This creature enters with a +1/+1 counter on it. {T}, Remove a counter from a permanent you control: Search your library for a Plains card and reveal it. If an opponent controls more lands than you, you may put that card onto the battlefield tapped. If you don't put the card onto the battlefield, put it into your hand. Then shuffle.

Flying As this creature enters, choose a card type. You and creatures you control have protection from the chosen card type.

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.) Skrelv can't block. {W/P}, {T}: Choose a color. Another target creature you control gains toxic 1 and hexproof from that color until end of turn. It can't be blocked by creatures of that color this turn. ({W/P} can be paid with either {W} or 2 life.)

When this creature enters, look at the top X cards of your library, where X is your devotion to blue. Put up to one of them on top of your library and the rest on the bottom of your library in a random order. If X is greater than or equal to the number of cards in your library, you win the game. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)

Whenever one or more Elves you control attack, they gain deathtouch until end of turn. Each creature you control has "Whenever a mana ability of this creature resolves, put a number of +1/+1 counters on it equal to the amount of mana this creature produced. This ability triggers only once each turn."

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.) Whenever a creature you control becomes the target of a spell, target opponent gets a poison counter.

Whenever you attack with two or more creatures, draw a card. {2}, Discard a card: Create a 2/2 white and blue Knight creature token with vigilance.

Target creature you control gets +X/+X and gains hexproof and indestructible until end of turn. (A creature with hexproof and indestructible can't be the target of spells or abilities your opponents control. Damage and effects that say "destroy" don't destroy it.)

This land enters tapped unless you control two or fewer other lands. {T}: Add {R} or {G}.

This land enters tapped unless you control two or fewer other lands. {T}: Add {U} or {B}.

This land enters tapped unless you control two or fewer other lands. {T}: Add {G} or {W}.

+1: Create a 1/1 white Soldier creature token with lifelink. −2: Put two +1/+1 counters on target creature. It becomes an Angel in addition to its other types and gains flying. −6: Return all nonland permanent cards with mana value 3 or less from your graveyard to the battlefield.

Whenever you cast an instant or sorcery spell, copy it. You may choose new targets for the copy. This ability triggers only once each turn. +2: Add two mana in any combination of colors. +1: Exile the top five cards of your library. Until the end of your next turn, you may cast an instant or sorcery spell from among those exiled cards. −X: Chandra deals X damage to each of up to two targets.

({U/P} can be paid with either {U} or 2 life.) Look at target player's hand. Draw a card.

Choose two — • Put two +1/+1 counters on up to one creature. It gains lifelink until end of turn. • Destroy each creature with power 2 or less. • Return up to two creature cards from your graveyard to your hand. • Each opponent sacrifices a creature with the highest power among creatures they control.

Exile all creatures. Incubate X, where X is the number of creatures exiled this way. (Create an Incubator token with X +1/+1 counters on it and "{2}: Transform this token." It transforms into a 0/0 Phyrexian artifact creature.)

Exile the top card of your library. During your next turn, you may play that card. Storm (When you cast this spell, copy it for each spell cast before it this turn.)

Companion — Your starting deck contains only cards with mana value 3 or greater and land cards. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.) When Keruga enters, draw a card for each other permanent you control with mana value 3 or greater.