When Niko Aris enters, create X Shard tokens. (They're enchantments with ", Sacrifice this enchantment: Scry 1, then draw a card.")

+1: Up to one target creature you control can't be blocked this turn. Whenever that creature deals damage this turn, return it to its owner's hand.

−1: Niko Aris deals 2 damage to target tapped creature for each card you've drawn this turn.

−1: Create a Shard token.

When Niko, Light of Hope enters, create two Shard tokens. (They're enchantments with ", Sacrifice this enchantment: Scry 1, then draw a card.")

, : Exile target nonlegendary creature you control. Shards you control become copies of it until the beginning of the next end step. Return it to the battlefield under its owner's control at the beginning of the next end step.

, Sacrifice Nim Replica: Target creature gets -1/-1 until end of turn.

Whenever Nimble Hobbit attacks, you may sacrifice a Food or pay . When you do, tap target creature an opponent controls.

Sacrifice No Rest for the Wicked: Return to your hand all creature cards in your graveyard that were put there from the battlefield this turn.

Each player who controls the most creatures investigates. Then destroy all creatures. (To investigate, create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Gift a Food (You may promise an opponent a gift as you cast this spell. If you do, they create a Food token before its other effects. It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")

Destroy target creature. If the gift wasn't promised, you lose 2 life.

, Sacrifice Nosy Goblin: Destroy target face-down creature.

, , Sacrifice Nova Cleric: Destroy all enchantments.

When Novice Inspector enters, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

When you cast this spell, draw two cards.

Flying

Annihilator 1 (Whenever this creature attacks, defending player sacrifices a permanent.)

Evoke (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

You have no maximum hand size.

Sonic Booster — Whenever Nyssa of Traken attacks, sacrifice any number of artifacts. When you sacrifice one or more artifacts this way, tap up to that many target creatures and draw that many cards.

Doctor's companion (You can have two commanders if the other is the Doctor.)

, , Sacrifice Oashra Cultivator: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

When Oath of Liliana enters, each opponent sacrifices a creature.

At the beginning of each end step, if a planeswalker entered the battlefield under your control this turn, create a 2/2 black Zombie creature token.

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

I — You and target opponent each create a Food token.

II — Each opponent loses 3 life. Create a Treasure token.

III — Create three tapped 1/1 white Spirit creature tokens with flying.

Casualty X. The copy isn't legendary and has starting loyalty X. (As you cast this spell, you may sacrifice a creature with power X. When you do, copy this spell. The copy becomes a token.)

+1: Each opponent loses 2 life unless they discard a card. If you control a Demon or Devil, you gain 2 life.

−2: Create a 1/1 red Devil creature token with "When this creature dies, it deals 1 damage to any target."

−7: Target player draws seven cards and loses 7 life.

, : Put a fate counter on target permanent.

, , Sacrifice Oblivion Stone: Destroy each nonland permanent without a fate counter on it, then remove all fate counters from all permanents.

: Draw a card, then discard a card.

, , Sacrifice Obsessive Stitcher: Return target creature card from your graveyard to the battlefield.

Flip a coin. If it comes up heads, counter target instant or sorcery spell. If it comes up tails, copy that spell and you may choose new targets for the copy.

(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. Create a Food token.

II — Draw a card. Create a Food token.

III — Create a 1/1 white Halfling creature token for each Food you control.

Whenever Ogre Marauder attacks, it gains "Ogre Marauder can't be blocked" until end of turn unless defending player sacrifices a creature.

+2: Create a Food token. (It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")

+1: Target artifact or creature loses all abilities and becomes a green Elk creature with base power and toughness 3/3.

−5: Exchange control of target artifact or creature you control and target creature an opponent controls with power 3 or less.

Old Man Willow's power and toughness are each equal to the number of lands you control.

Whenever Old Man Willow attacks, you may sacrifice another creature or a token. When you do, target creature an opponent controls gets -2/-2 until end of turn.

Flying, lifelink

Whenever one or more outlaws you control deal combat damage to a player, create a Treasure token. (Assassins, Mercenaries, Pirates, Rogues, and Warlocks are outlaws.)

, Sacrifice two Treasures: Put two +1/+1 counters on each creature you control. Activate only as a sorcery.

Vigilance

Sacrifice Ollenbock Escort: Target creature you control with a +1/+1 counter on it gains lifelink and indestructible until end of turn.

Flash

When Omen of the Dead enters, return target creature card from your graveyard to your hand.

, Sacrifice Omen of the Dead: Scry 2.

Flash

When Omen of the Hunt enters, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

, Sacrifice Omen of the Hunt: Scry 2.

Flash

When Omen of the Sun enters, create two 1/1 white Human Soldier creature tokens and you gain 2 life.

, Sacrifice Omen of the Sun: Scry 2.

Creatures you control get +2/+1 until end of turn. Investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Whenever one or more creatures you control deal combat damage to a player, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

, Exile a creature card from your graveyard: Investigate. You gain 2 life.

Whenever one or more artifacts you control leave the battlefield during your turn, create a 1/1 colorless Construct artifact creature token. This ability triggers only once each turn.

, Sacrifice an artifact: Oni-Cult Anvil deals 1 damage to each opponent. You gain 1 life.

, , Sacrifice Orazca Puzzle-Door: Look at the top two cards of your library. Put one of those cards into your hand and the other into your graveyard.

, : Add two mana in any combination of colors. Spend this mana only to cast Dragon spells or activate abilities of Dragons.

, , Sacrifice Orb of Dragonkind: Look at the top seven cards of your library. You may reveal a Dragon card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

When Orchard Strider enters, create two Food tokens. (They're artifacts with ", , Sacrifice this artifact: You gain 3 life.")

Basic landcycling (, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

When Orcish Hellraiser dies, it deals 2 damage to target player or planeswalker.

, Sacrifice an artifact: Orcish Mechanics deals 2 damage to any target.

, , Sacrifice Orcish Settlers: Destroy X target lands.

Enchant creature

Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice Ordeal of Erebos.

When you sacrifice Ordeal of Erebos, target player discards two cards.

Enchant creature

Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice Ordeal of Nylea.

When you sacrifice Ordeal of Nylea, search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Enchant creature

Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice Ordeal of Thassa.

When you sacrifice Ordeal of Thassa, draw two cards.

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

I — Origin of the Hidden Ones deals 4 damage to any target.

II — Create two 1/1 black Assassin creature tokens with menace.

III — Whenever an Assassin you control attacks this turn, create a 1/1 black Assassin creature token with menace that's tapped and attacking.

Flying, trample, lifelink

Sacrifice another creature: Draw a card.

, : Create a token that's a copy of another target creature you control. It gains haste. Sacrifice it at the beginning of the next end step. Activate only as a sorcery.

, : Create five tokens that are copies of another target creature you control. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.

: Add or .

, , Sacrifice Orzhov Locket: Draw two cards.

When you cast this spell, create a token that's a copy of it, except it isn't legendary.

: Add . Spend this mana only to cast an artifact spell or activate an ability of an artifact.

Paradox — Whenever you cast a spell from anywhere other than your hand, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Deathtouch

: Until end of turn, you may cast creature spells from your graveyard by foraging in addition to paying their other costs. If you cast a spell this way, that creature enters with a finality counter on it. (To forage, exile three cards from your graveyard or sacrifice a Food. If a creature with a finality counter on it would die, exile it instead.)

, Sacrifice Ouphe Vandals: Counter target activated ability from an artifact source and destroy that artifact if it's on the battlefield. (Mana abilities can't be targeted.)

, Sacrifice Outland Liberator: Destroy target artifact or enchantment.

Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

Discard a card, Sacrifice Overeager Apprentice: Add .

Sacrifice a land: You gain 3 life.