Arcane Signet

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

Preordain

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

Regrowth

Return target card from your graveyard to your hand.

Emeritus of Abundance

Vigilance
This creature enters prepared.
Whenever this creature attacks, if you control eight or more lands, this creature becomes prepared.

Emeritus of Abundance // Regrowth

Sol Ring

Quandrix, the Proof

Flying, trample
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)
Instant and sorcery spells you cast from your hand have cascade.

Biblioplex Tomekeeper

When this creature enters, choose up to one —
• Target creature becomes prepared. (Only creatures with prepare spells can become prepared.)
• Target creature becomes unprepared.

Stream of Life

Infirmary Healer

This creature enters prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

Infirmary Healer // Stream of Life

Talisman of Curiosity

{T}: Add {C}.
{T}: Add {G} or {U}. This artifact deals 1 damage to you.

Zimone's Experiment

Look at the top five cards of your library. You may reveal up to two creature and/or land cards from among them, then put the rest on the bottom of your library in a random order. Put all land cards revealed this way onto the battlefield tapped and put all creature cards revealed this way into your hand.

Cyclonic Rift

Return target nonland permanent you don't control to its owner's hand.
Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Vibrant Idea

Landscape Painter

Landscape Painter // Vibrant Idea

Arcane Denial

Counter target spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep.
You draw a card at the beginning of the next turn's upkeep.

Embrace the Paradox

Draw three cards. You may put a land card from your hand onto the battlefield tapped.

Follow the Lumarets

Infusion — Look at the top four cards of your library. You may reveal a creature or land card from among them and put it into your hand. If you gained life this turn, you may instead reveal two creature and/or land cards from among them and put them into your hand. Put the rest on the bottom of your library in a random order.

Daze

You may return an Island you control to its owner's hand rather than pay this spell's mana cost.
Counter target spell unless its controller pays {1}.

Quick Study

Topiary Lecturer

Increment (Whenever you cast a spell, if the amount of mana you spent is greater than this creature's power or toughness, put a +1/+1 counter on this creature.)
{T}: Add an amount of {G} equal to this creature's power.

Thunderclap Drake

Flying
Instant and sorcery spells you cast cost {1} less to cast.
{2}{U}, Sacrifice this creature: When you next cast an instant or sorcery spell this turn, copy it for each time you've cast your commander from the command zone this game. You may choose new targets for the copies.

Spell Pierce

Counter target noncreature spell unless its controller pays {2}.

Rampant Growth

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Studious First-Year

Studious First-Year // Rampant Growth

Flow State

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. If there is an instant card and a sorcery card in your graveyard, instead put two of them into your hand and the rest on the bottom of your library in any order.

Planar Engineering

Sacrifice two lands. Search your library for four basic land cards, put them onto the battlefield tapped, then shuffle.

Environmental Scientist

When this creature enters, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.