Well Done

Well Done deals 5 damage to target creature. If that creature is rare or mythic rare, Well Done deals 3 damage to that creature's controller.

Ignacio of Myra's Marvels

As Ignacio of Myra's Marvels enters, choose armor, blood, book, bottle, fang, fire, scroll, spear, sword, or water.
Whenever you cast a spell with the chosen object in its art, create two Treasure tokens.
Partner (You can have two commanders if both have partner.)

Goblin Girder Gang

Reach
Whenever you roll a die, if the result isn't stored on this creature, you may store that result on it. When you do, this creature deals 1 damage to any target without a hat.
This creature gets +1/+0 for each result stored on it.

Devil K. Nevil

Haste
When Devil K. Nevil enters, jump it over any number of creatures. If it clears those creatures, put that many +1/+1 counters on it. (You can see a jumping demonstration at DevilKNevil.com.)

T.A.P.P.E.R.

{T}, Tap an untapped creature you control that has a hat: Tap target creature.

Autograph Book

This artifact enters with a page counter on it for each person who has signed it.
{3}, {T}, Remove a page counter from this artifact: Draw a card.

Park Map

{1}, Sacrifice this artifact: Search your library for a land card that doesn't have the same art as a permanent you control, reveal it, put it into your hand, then shuffle.

Pietra, Crafter of Clowns

Haste
Robots you control get +1/+1.
{R}{W}, {T}, Tell a joke you haven't told this game to someone outside the game: Create a 1/1 white Clown Robot artifact creature token. If that person laughed, the token gains haste until end of turn.

Leading Performance

Choose two letters. Put a +1/+1 counter on each creature you control whose name begins with either of the chosen letters.

Carnival Barker

{T}: You have thirty seconds to laud a creature you control to any people outside the game. Until end of turn, that creature gains trample and haste and gets +X/+0, where X is the number of those people who applauded. Activate only as a sorcery and only once.

Park Re-Entry

Return up to two target creature cards that each have a hat and/or mana value 3 or less from your graveyard to the battlefield.

Surprise Party

When this enchantment enters, yell "Surprise!" and put onto the battlefield any number of printed Clown Robot tokens that aren't touching each other, that you hid on the battlefield before you cast this enchantment, and that weren't spotted by an opponent before you cast this enchantment.
Robots you control get +1/+0 and have vigilance.

Get Your Head in the Game

Flash
When this enchantment enters, exile target nonland permanent until it (this card) leaves the battlefield, then touch it (this card) to your head. When it (this card) stops touching it (your head), sacrifice it (the card, not your head).