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

When Wizened Arbiter enters, you may reveal a white card you own from outside the game. If you do, exchange that card with a card in your hand.

Equipped creature has prowess.
If a triggered ability of equipped creature triggers, that ability triggers an additional time.
Equip Wizard
Equip

: Exile target instant or sorcery card from a graveyard. Roll a d20. Activate only as a sorcery.
1-9 | Copy that card. You may cast the copy.
10-19 | Copy that card. You may cast the copy by paying rather than paying its mana cost.
20 | Copy each card exiled with this artifact. You may cast any number of the copies without paying their mana costs.

: Add .
, : Add .
, : Add or .

This artifact enters tapped.
, , Sacrifice this artifact: Add X mana in any combination of colors.
When this artifact is put into a graveyard from the battlefield, draw a card.

This spell costs less to cast if you control a Wizard.
Counter target spell.

When this creature enters, you may put a name sticker on it, then look at the top X cards of your library, where X is the number of unique vowels on that sticker. Put one of those cards into your hand and the rest on the bottom of your library in any order. (The vowels are A, E, I, O, U, and Y.)

Myriad
Instant and sorcery spells you cast cost less to cast.
You may cast sorcery spells as though they had flash.

This spell costs less to cast if you control a Wizard.
Wizard's Lightning deals 3 damage to any target.

Flying
, Sacrifice this creature: Counter target spell unless its controller pays .

: Return this creature and target creature you control to their owner's hand.

Create a Character (Any nonlegendary creature can choose this as its Background. It becomes legendary and can be your commander.)
Commander creatures you own are Clerics, Rogues, Warriors, and Wizards in addition to their other types.
As long as you have a full party, if an ability of a creature you control triggers, that ability triggers an additional time.

(Gain the next level as a sorcery to add its ability.)
You have no maximum hand size.
: Level 2
When this Class becomes level 2, draw two cards.
: Level 3
Whenever you draw a card, put a +1/+1 counter on target creature you control.

, Sacrifice this creature: Counter target noncreature spell unless its controller pays .

Whenever you cast a noncreature spell, this token deals 1 damage to each opponent.

: Add . Spend this mana only to cast a planeswalker spell.

Alliance — Whenever another creature you control enters, this creature deals 1 damage to each opponent.

Flying
When this creature enters, if your starting library had at least 13 cards over the minimum, search your library for a card and put that card into your hand, then shuffle. Otherwise, this creature deals 4 damage to you.

Target player discards their hand.

Target player shuffles up to four target cards from their graveyard into their library. You look at the top four cards of your library, then put one of those cards into your hand and the rest on the bottom of your library in a random order.

Devoid
Target opponent exiles two cards from their hand and loses 2 life.

Enchant creature
Enchanted creature loses all abilities and is a green and white Citizen creature with base power and toughness 1/1 named Legitimate Businessperson. (It loses all other colors, card types, creature types, and names.)

Flying
: Scry 1.