Jhoira, Weatherlight Corsair

Whenever Jhoira enters or attacks, target opponent reveals cards from the top of their library until they reveal a historic permanent card. You put that card onto the battlefield under your control and lose life equal to that permanent's mana value. That player puts the rest of the revealed cards on the bottom of their library in a random order. (Artifacts, legendaries, and Sagas are historic.)

Copy

Venser, Fervent Forger

Flash
When Venser enters, choose one —
• Copy target instant or sorcery spell an opponent controls twice. You may choose new targets for the copies.
• Create two tokens that are copies of target permanent an opponent controls. They gain haste. At the beginning of the next end step, sacrifice them.

Niv-Mizzet, Ghost Counsel

Flying
Whenever you gain life, you may pay that much life. If you do, draw that many cards.
{T}: Each opponent loses 1 life and you gain 1 life.

Tamiyo, Upriser Crowned

Flying, double strike, haste
When Tamiyo enters, you become the monarch.
Whenever one or more creatures deal combat damage to you while you're the monarch, tap those creatures and put a stun counter on each of them.

The Ur-Sphinx

Eminence — As long as The Ur-Sphinx is in the command zone or on the battlefield, other Sphinx spells you cast cost {1} less to cast.
Flying
Whenever one or more Sphinxes you control attack, each player mills that many cards. For each player, you may cast a card that player milled this way without paying its mana cost.

Darksteel Angel

Flying, indestructible
You can't lose the game and your opponents can't win the game.
Creatures you control can't have -1/-1 counters put on them.

Ginger, Queen of Sweets

Gingerbrute Token

When Ginger enters, you become the monarch.
{2}, {T}, Sacrifice Ginger: You gain 6 life.
At the beginning of each upkeep, if you're the monarch, create a Gingerbrute token. (It's a {1} 1/1 Food Golem artifact creature with haste, "{1}: This token can't be blocked this turn except by creatures with haste," and "{2}, {T}, Sacrifice this token: You gain 3 life.")

Reality Fracture Commander