Izzet goblin jank

As this enchantment enters, choose a creature type.

Creatures you control are the chosen type in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

Haste (This creature can attack and {T} as soon as it comes under your control.)

{T}, Sacrifice this creature: It deals 1 damage to any target.

Create a number of 1/1 red Goblin creature tokens equal to two plus the number of cards named Goblin Gathering in your graveyard.

When this creature enters, create a 1/1 red Goblin creature token.

({T}: Add {U}.)

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

At the beginning of combat on your turn, create a 1/1 red Goblin creature token. That token gains haste until end of turn and attacks this combat if able.

({T}: Add {R}.)

{1}, {T}: Target player mills a card. (They put the top card of their library into their graveyard.)

Tap four untapped Advisors you control: Target player mills twelve cards.

A deck can have any number of cards named Persistent Petitioners.

When this creature enters, create three 1/1 red Goblin creature tokens.

{1}{R}, Sacrifice a Goblin: This creature deals 2 damage to any target.

Sacrifice a Goblin: Add {R}.

({T}: Add {U} or {R}.)

As this land enters, you may pay 2 life. If you don't, it enters tapped.

This land enters tapped unless you control an Island or a Mountain.

{T}: Add {U} or {R}.

When this creature enters, it deals damage to target creature an opponent controls equal to the number of Goblins you control.

When this creature enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")