Hapatra, Vizier of Poisons

Whenever Hapatra, Vizier of Poisons deals combat damage to a player, you may put a -1/-1 counter on target creature.
Whenever you put one or more -1/-1 counters on a creature, create a 1/1 green Snake creature token with deathtouch.

Sneak Attack

: You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the next end step.

Selvala, Heart of the Wilds

Whenever another creature enters the battlefield, its controller may draw a card if its power is greater than each other creature’s power.
, : Add X mana in any combination of colors, where X is the greatest power among creatures you control.

Outnumber

Outnumber deals damage to target creature equal to the number of creatures you control.

Opt

Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)
Draw a card.

Inspired Ultimatum

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

Gyruda, Doom of Depths

Companion — Your starting deck contains only cards with even converted mana costs. (If this card is your chosen companion, you may put it into your hand from outside the game for any time you could cast a sorcery.)
When Gyruda enters the battlefield, each player mills four cards. Put a creature card with an even converted mana cost from among the milled cards onto the battlefield under your control.

Inspired Ultimatum

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

Gyruda, Doom of Depths

Companion — Your starting deck contains only cards with even converted mana costs. (If this card is your chosen companion, you may put it into your hand from outside the game for any time you could cast a sorcery.)
When Gyruda enters the battlefield, each player mills four cards. Put a creature card with an even converted mana cost from among the milled cards onto the battlefield under your control.

Inspired Ultimatum

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

Gyruda, Doom of Depths

Companion — Your starting deck contains only cards with even converted mana costs. (If this card is your chosen companion, you may put it into your hand from outside the game for any time you could cast a sorcery.)
When Gyruda enters the battlefield, each player mills four cards. Put a creature card with an even converted mana cost from among the milled cards onto the battlefield under your control.

Gyruda, Doom of Depths

Companion — Your starting deck contains only cards with even converted mana costs. (If this card is your chosen companion, you may put it into your hand from outside the game for any time you could cast a sorcery.)
When Gyruda enters the battlefield, each player mills four cards. Put a creature card with an even converted mana cost from among the milled cards onto the battlefield under your control.

Inspired Ultimatum

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

Descend upon the Sinful

Exile all creatures.
Delirium — Create a 4/4 white Angel creature token with flying if there are four or more card types among cards in your graveyard.

Aurelia’s Fury

Aurelia’s Fury deals X damage divided as you choose among any number of targets. Tap each creature dealt damage this way. Players dealt damage this way can’t cast noncreature spells this turn.

Nightmare Shepherd

Flying
Whenever another nontoken creature you control dies, you may exile it. If you do, create a token that’s a copy of that creature, except it’s 1/1 and it’s a Nightmare in addition to its other types.

The Birth of Meletis

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Search your library for a basic Plains card, reveal it, put it into your hand, then shuffle your library.
II — Create a 0/4 colorless Wall artifact creature token with defender.
III — You gain 2 life.

Nightmare Shepherd

Flying
Whenever another nontoken creature you control dies, you may exile it. If you do, create a token that’s a copy of that creature, except it’s 1/1 and it’s a Nightmare in addition to its other types.

Nightmare Shepherd

Flying
Whenever another nontoken creature you control dies, you may exile it. If you do, create a token that’s a copy of that creature, except it’s 1/1 and it’s a Nightmare in addition to its other types.

Nightmare Shepherd

Flying
Whenever another nontoken creature you control dies, you may exile it. If you do, create a token that’s a copy of that creature, except it’s 1/1 and it’s a Nightmare in addition to its other types.

Teferi, Temporal Archmage

+1: Look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.
−1: Untap up to four target permanents.
−10: You get an emblem with “You may activate loyalty abilities of planeswalkers you control on any player’s turn any time you could cast an instant.”
Teferi, Temporal Archmage can be your commander.

Fierce Invocation

Manifest the top card of your library, then put two +1/+1 counters on it. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it’s a creature card.)

Altar’s Reap

As an additional cost to cast this spell, sacrifice a creature.
Draw two cards.

Outnumber

Outnumber deals damage to target creature equal to the number of creatures you control.

Anticipate

Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.