Monitor Monitor

When Monitor Monitor enters the battlefield, open an Attraction. (Put the top card of your Attraction deck onto the battlefield.)
Once each turn, you may pay to reroll one or more dice you rolled.

Standard Procedure

, Reveal Standard Procedure from your hand: Choose an instant or sorcery card with mana value 3 or less currently legal in the Standard format. Standard Procedure becomes that card until end of turn.

Claire D’Loon, Joy Sculptor

When Claire D’Loon, Joy Sculptor enters the battlefield, for the rest of the game, tokens you own become cards that are still tokens. (They continue to exist after they leave the battlefield.)
, : You may put a token from your graveyard or hand onto the battlefield.

Kobold Warcaller

: Choose a creature card in your hand. It perpetually gains haste.

Shapeshifter

Changeling (This token is every creature type.)

Mocking Doppelganger

Flash
You may have Mocking Doppelganger enter the battlefield as a copy of a creature an opponent controls, except it has “Other creatures with the same name as this creature are goaded.” (They attack each combat if able and attack a player other than you if able.)