You may spend mana as though it were mana of any color to activate abilities of creatures you control.

Creatures you control with +1/+1 counters on them have all activated abilities of all creature cards exiled with Agatha's Soul Cauldron.

{T}: Exile target card from a graveyard. When a creature card is exiled this way, put a +1/+1 counter on target creature you control.

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

{T}: Draw three cards.

{2}{U}{U}: Return Arcanis the Omnipotent to its owner's hand.

Flying

Whenever you cycle or discard another card, put a -1/-1 counter on each creature your opponents control.

Cycling {2} ({2}, Discard this card: Draw a card.)

{T}: Target artifact creature's controller sacrifices it. That player may search their library for a noncreature artifact card, put it onto the battlefield, then shuffle.

Tap an untapped Wizard you control: Draw a card.

{T}: Gain control of target creature with power less than or equal to the number of creatures you control.

When Big Game Hunter enters the battlefield, destroy target creature with power 4 or greater. It can't be regenerated.

Madness {B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Creatures you control are artifacts in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

Whenever you cast an artifact spell, you lose 1 life and create a 2/2 black Necron Warrior artifact creature token.

Whenever you discard a creature card, create a 2/2 black Zombie creature token.

Whenever you discard a land card, add {B}{B}.

Whenever you discard a noncreature, nonland card, draw a card.

Add {B}{B}{B}.

Threshold -- Add {B}{B}{B}{B}{B} instead if seven or more cards are in your graveyard.

Counter target spell unless its controller pays {1} for each card in your graveyard.

Madness {U} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Whenever you discard a card, you may exile that card from your graveyard. If you do, you may play that card this turn.

Converge -- Crystalline Crawler enters the battlefield with a +1/+1 counter on it for each color of mana spent to cast it.

Remove a +1/+1 counter from Crystalline Crawler: Add one mana of any color.

{T}: Put a +1/+1 counter on Crystalline Crawler.

Whenever you discard a card, you may exile that card from your graveyard.

{2}, {T}: Draw a card, then discard a card.

{T}: Put a card exiled with Currency Converter into your graveyard. If it's a land card, create a Treasure token. If it's a nonland card, create a 2/2 black Rogue creature token.

Sacrifice Cursecatcher: Counter target instant or sorcery spell unless its controller pays {1}.

Graft 2 (This creature enters the battlefield with two +1/+1 counters on it. Whenever another creature enters the battlefield, you may move a +1/+1 counter from this creature onto it.)

{U}, {T}: Gain control of target creature with a +1/+1 counter on it for as long as Cytoplast Manipulator remains on the battlefield.

{T}, Sacrifice Daring Apprentice: Counter target spell.

Add {B}{B}{B}.

Destroy target nonblack creature.

Madness {B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Magecraft -- Whenever you cast or copy an instant or sorcery spell, create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it, where X is that spell's mana value.

{3}{U}: Target creature token can't be blocked this turn.

Target player draws two cards.

Flashback--{1}{U}, Pay 3 life. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

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

{1}, {T}: Add {U}{B}.

Return target creature card from your graveyard to the battlefield.

Flashback--Sacrifice three creatures. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

At the beginning of your upkeep, you lose 1 life and amass Zombies 1. (Put a +1/+1 counter on an Army you control. It's also a Zombie. If you don't control an Army, create a 0/0 black Zombie Army creature token first.)

Whenever a Zombie token you control with power 6 or greater attacks, it gains lifelink until end of turn.

Each player shuffles their hand and graveyard into their library, then draws seven cards.

Flashback {2}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

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

Search your library for an artifact card, reveal it, put it into your hand, then shuffle.

Until end of turn, target creature gains "When this creature dies, return it to the battlefield tapped under its owner's control with a +1/+1 counter on it."

Flying

{U}, Sacrifice Glen Elendra Archmage: Counter target noncreature spell.

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Hangarback Walker enters the battlefield with X +1/+1 counters on it.

When Hangarback Walker dies, create a 1/1 colorless Thopter artifact creature token with flying for each +1/+1 counter on Hangarback Walker.

{1}, {T}: Put a +1/+1 counter on Hangarback Walker.

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

{T}: Untap another target permanent.

{T}: Untap two other target legendary creatures.

Iron Apprentice enters the battlefield with a +1/+1 counter on it.

When Iron Apprentice dies, if it had counters on it, put those counters on target creature you control.

Return target creature to its owner's hand.

Madness {U} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Whenever you discard a card, you may pay {1}. If you do, amass 2. (Put two +1/+1 counters on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.)

{T}: Add {B}.

Flying

{T}: Draw a card, then discard a card.

{X}: Likeness Looter becomes a copy of target creature card in your graveyard with mana value X, except it has flying and this ability. Activate only as a sorcery.

{U}, Sacrifice Malevolent Hermit: Counter target noncreature spell unless its controller pays {3}.

Disturb {2}{U} (You may cast this card from your graveyard transformed for its disturb cost.)

Flying

Noncreature spells you control can't be countered.

If Benevolent Geist would be put into a graveyard from anywhere, exile it instead.

{T}: Draw a card, then discard a card.

As Metallic Mimic enters the battlefield, choose a creature type.

Metallic Mimic is the chosen type in addition to its other types.

Each other creature you control of the chosen type enters the battlefield with an additional +1/+1 counter on it.

{T}, Mill a card: Add {C}. (To mill a card, put the top card of your library into your graveyard.)

Counter target instant or sorcery spell.

Transmute {1}{U}{U} ({1}{U}{U}, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

As long as Necrotic Ooze is on the battlefield, it has all activated abilities of all creature cards in all graveyards.

Draw a card.

Madness {U} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Flash

When Orcish Bowmasters enters the battlefield and whenever an opponent draws a card except the first one they draw in each of their draw steps, Orcish Bowmasters deals 1 damage to any target. Then amass Orcs 1.

Flying

{T}: Add one mana of any color.

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

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I -- Put a +1/+1 counter on up to one target creature. That creature becomes an artifact in addition to its other types.

II -- Destroy all nonartifact creatures.

III -- Exile all opponents' graveyards.

Exile target artifact or creature, then return it to the battlefield under its owner's control with a +1/+1 counter on it.

When Proft's Eidetic Memory enters the battlefield, draw a card.

You have no maximum hand size.

At the beginning of combat on your turn, if you've drawn more than one card this turn, put X +1/+1 counters on target creature you control, where X is the number of cards you've drawn this turn minus one.

Whenever you cast a legendary spell, untap Rona, Herald of Invasion.

{T}: Draw a card, then discard a card.

{5}{B/P}: Transform Rona. Activate only as a sorcery. ({B/P} can be paid with either {B} or 2 life.)

Trample

Whenever a source deals damage to Rona, Tolarian Obliterator, that source's controller exiles a card from their hand at random. If it's a land card, you may put it onto the battlefield under your control. Otherwise, you may cast it without paying its mana cost.

Flying

Shauku, Endbringer can't attack if there's another creature on the battlefield.

At the beginning of your upkeep, you lose 3 life.

{T}: Exile target creature and put a +1/+1 counter on Shauku.

{T}: Add {U}.

Flying

{U}, Sacrifice Siren Stormtamer: Counter target spell or ability that targets you or a creature you control.

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

{U/P}: Change a target of target spell or ability to Spellskite. ({U/P} can be paid with either {U} or 2 life.)

{T}: Put a +1/+1 counter on each artifact creature you control.

{T}: Add {C}.

{T}: Add {U} or {B}. Talisman of Dominance deals 1 damage to you.

If you would draw a card except the first one you draw in each of your draw steps, draw two cards instead.

Exile target permanent you control. Return that card to the battlefield under its owner's control at the beginning of the next end step. If it enters the battlefield as a creature, it enters with an additional +1/+1 counter on it.

+1: Untap up to two target artifacts.

-X: Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.

-5: Artifacts you control become artifact creatures with base power and toughness 5/5 until end of turn.

Whenever a creature you control leaves the battlefield, if it had counters on it, put those counters on The Ozolith.

At the beginning of combat on your turn, if The Ozolith has counters on it, you may move all counters from The Ozolith onto target creature.

{T}: Draw a card, then discard a card.

Partner with Pir, Imaginative Rascal (When this creature enters the battlefield, target player may put Pir into their hand from their library, then shuffle.)

Whenever you draw a card, put a +1/+1 counter on Toothy, Imaginary Friend.

When Toothy leaves the battlefield, draw a card for each +1/+1 counter on it.

When Tribute Mage enters the battlefield, you may search your library for an artifact card with mana value 2, reveal that card, put it into your hand, then shuffle.

Other blue creatures you control have "Whenever this creature becomes tapped, draw a card, then discard a card."

Other artifact creatures you control get +1/+1.

{U/P}: Until end of turn, target creature you control becomes a blue artifact in addition to its other colors and types. Activate only as a sorcery. ({U/P} can be paid with either {U} or 2 life.)

Until end of turn, target creature gains "When this creature dies, return it to the battlefield tapped under its owner's control with a +1/+1 counter on it."

Return target creature card with mana value 3 or less from your graveyard to the battlefield.

Cycling {2} ({2}, Discard this card: Draw a card.)

Untap all artifacts you control during each other player's untap step.

When Urza, Lord High Artificer enters the battlefield, create a 0/0 colorless Construct artifact creature token with "This creature gets +1/+1 for each artifact you control."

Tap an untapped artifact you control: Add {U}.

{5}: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

{T}: Draw a card, then discard a card. If you discarded an instant or sorcery card this way, each opponent loses 1 life and you gain 1 life.

{2}, Sacrifice Vohar, Vodalian Desecrator: You may cast target instant or sorcery card from your graveyard this turn. If that spell would be put into your graveyard, exile it instead. Activate only as a sorcery.

Walking Ballista enters the battlefield with X +1/+1 counters on it.

{4}: Put a +1/+1 counter on Walking Ballista.

Remove a +1/+1 counter from Walking Ballista: It deals 1 damage to any target.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)

Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.