Jeannie L Paske

Its powers are simple—mind over matter. Or rather, an immeasurable mind disassembling and reconfiguring matter.

Matter Reshaper

({C} represents colorless mana.)
When this creature dies, reveal the top card of your library. You may put that card onto the battlefield if it's a permanent card with mana value 3 or less. Otherwise, put that card into your hand.

Imaginary Friends (Plane)

Players may cast spells as though they were other cards legal in this game's format with the same type and mana cost. (Mana cost includes color.)
Whenever chaos ensues, exile cards from the top of your library until you reveal a nonland card. You may cast that card without paying its mana cost, but only as another card following this plane's first ability. Put the rest on the bottom of your library in a random order.

Toothy, Imaginary Friend

Partner with Pir, Imaginative Rascal (When this creature enters, target player may put Pir into their hand from their library, then shuffle.)
Whenever you draw a card, put a +1/+1 counter on Toothy.
When Toothy leaves the battlefield, draw a card for each +1/+1 counter on it.

The Gitrog Monster

Deathtouch
At the beginning of your upkeep, sacrifice The Gitrog Monster unless you sacrifice a land.
You may play an additional land on each of your turns.
Whenever one or more land cards are put into your graveyard from anywhere, draw a card.

Pir, Imaginative Rascal

Partner with Toothy, Imaginary Friend (When this creature enters, target player may put Toothy into their hand from their library, then shuffle.)
If one or more counters would be put on a permanent your team controls, that many plus one of each of those kinds of counters are put on that permanent instead.