Armand Baltazar

Chronicler of Worship

When Chronicler of Worship enters the battlefield, put a random Shrine card from among the top seven cards of your library into your hand. It perpetually gains "This spell costs {1} less to cast." Then shuffle.
{T}: Add one mana of any color.

Eldrazi

Ruin in Their Wake

Devoid (This card has no color.)
Search your library for a basic land card and reveal it. You may put that card onto the battlefield tapped if you control a land named Wastes. Otherwise, put that card into your hand. Then shuffle.

The goblin word for "vacation" translates roughly to "a battered landscape of noise and violence."

The Space Family Goblinson

The Space Family Goblinson has trample as long as you've rolled three or more dice this turn.
Whenever you roll a die, put a +1/+1 counter on The Space Family Goblinson.

Scampire

When Scampire enters, you get {TK}, then you may put a sticker on a creature card in your graveyard.
{3}{B}: Return target creature card with a sticker on it from your graveyard to the battlefield. That creature gains haste. Exile it at the beginning of the next end step. Activate only as a sorcery.

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.