Yangtian Li

Boss's Chauffeur

Boss's Chauffeur enters the battlefield with a number of +1/+1 counters on it equal to one plus the number of other creatures you control.
Alliance — Whenever another creature enters the battlefield under your control, put a +1/+1 counter on Boss's Chauffeur.
When Boss's Chauffeur dies, create a 1/1 green and white Citizen creature token for each +1/+1 counter on it.

This creature enters with a number of +1/+1 counters on it equal to one plus the number of other creatures you control.
Alliance — Whenever another creature you control enters, put a +1/+1 counter on this creature.
When this creature dies, create a 1/1 green and white Citizen creature token for each +1/+1 counter on it.

Storm Crow

Richlau, Headmaster

At the beginning of your end step, you may pay {1}. When you do, target artifact card in your graveyard perpetually gains "This spell costs {1} less to cast." If it's a creature or Vehicle card, it perpetually gets +2/+2. Put it into your library second from the top.

As far as Lila was concerned, all courtesy should be common.

Lila, Hospitality Hostess

You may look at the top card of your library any time.
You may cast common spells from the top of your library.
Guests you control get +1/+1.

Like any young zombie, Gary dreamed of escaping the underworld to join the circus.

Gray Merchant of Alphabet

When this creature enters, choose a letter. For each creature you control that has the chosen letter in its name, you gain 1 life and each opponent loses 1 life.

There are no small parts, only small performers.

Glitterflitter

Flying
When Glitterflitter enters, you get {TK}, then you may put a sticker on a nonland permanent you own.

Dissatisfied Customer

Flying, haste
When this creature enters, roll a six-sided die. If the result is 3 or less, you lose that much life.

Everyone wants to talk about the elephant in this room.

Aerialephant

Flying
When Aerialephant enters, you get {TK}, then you may put a sticker on a nonland permanent you own.

When he's threatened, the forest buzzes and the air hums with dragonfly wings.

Cloakwood Swarmkeeper

Gathered Swarm — Whenever one or more tokens you control enter, put a +1/+1 counter on this creature.