Spells and abilities your opponents control can't cause their controller to search their library.

-1: Target player mills four cards. Then exile each opponent's graveyard.

Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Draw a card.

At the beginning of each opponent's upkeep, if that player has one or fewer cards in hand, Davriel, Rogue Shadowmage deals 2 damage to them.

-1: Target player discards a card.

Surveil 2, then draw a card. (To surveil 2, look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

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Each opponent returns a nonland permanent they control with the highest mana value among permanents they control to its owner's hand, then discards a card.

When Eternal Skylord enters the battlefield, 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.)

Zombie tokens you control have flying.

Whenever you cast a noncreature spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

When Gleaming Overseer enters the battlefield, amass 1. (Put a +1/+1 counter on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.)

Zombie tokens you control have hexproof and menace.

Draw two cards. If you control a Jace planeswalker, draw three cards instead.

+1: Until your next turn, whenever a creature an opponent controls attacks, it gets -1/-0 until end of turn.

-2: Reveal the top three cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other on the bottom of your library in any order.

-8: For each player, search that player's library for a nonland card and exile it, then that player shuffles. You may cast those cards without paying their mana costs.

Enchant creature or planeswalker you control

When enchanted permanent dies or is put into exile, return that card to the battlefield under your control.

When Kiora's Dambreaker enters the battlefield, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Whenever a player sacrifices a permanent, Mayhem Devil deals 1 damage to any target.

Each opponent can't draw more than one card each turn.

-2: Look at the top four cards of your library. You may reveal a noncreature, nonland card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Nicol Bolas, Dragon-God has all loyalty abilities of all other planeswalkers on the battlefield.

+1: You draw a card. Each opponent exiles a card from their hand or a permanent they control.

-3: Destroy target creature or planeswalker.

-8: Each opponent who doesn't control a legendary creature or planeswalker loses the game.

This spell can't be countered.

Flying

Whenever you draw a card, Niv-Mizzet, Parun deals 1 damage to any target.

Whenever a player casts an instant or sorcery spell, you draw a card.

Counter target creature or planeswalker spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

Scry 1.

Target creature gets -5/-5 until end of turn. If that creature would die this turn, exile it instead.

+1: Look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.

-3: Ral, Izzet Viceroy deals damage to target creature equal to the total number of instant and sorcery cards you own in exile and in your graveyard.

-8: You get an emblem with "Whenever you cast an instant or sorcery spell, this emblem deals 4 damage to any target and you draw two cards."

When Rona, Disciple of Gix enters the battlefield, you may exile target historic card from your graveyard. (Artifacts, legendaries, and Sagas are historic.)

You may cast spells from among cards exiled with Rona.

{4}, {T}: Exile the top card of your library.

Whenever you cast a noncreature spell, create a 1/1 colorless Servo artifact creature token.

-2: Target artifact you control becomes a copy of another target artifact or creature you control until end of turn, except it's an artifact in addition to its other types.

Whenever a creature attacks you or a planeswalker you control, each Dragon you control deals 1 damage to that creature.

+1: Until end of turn, each planeswalker you control becomes a 4/4 red Dragon creature and gains flying.

-3: Create a 4/4 red Dragon creature token with flying.

Choose one --

• Destroy target creature with mana value 3 or less.

• Return target creature to its owner's hand.

Amass 2, then the Army you amassed deals damage equal to its power to each non-Army creature. (To 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.)