Goblin Lore

Draw four cards, then discard three cards at random.

Careful Study

Burning Inquiry

Each player draws three cards, then discards three cards at random.

Sol Ring

Breakthrough

Draw four cards, then choose X cards in your hand and discard the rest.

Kyren Archive

At the beginning of your upkeep, you may exile the top card of your library face down.
{5}, Discard your hand, Sacrifice Kyren Archive: Put all cards exiled with Kyren Archive into their owner's hand.

Arcane Signet

{T}: Add one mana of any color in your commander's color identity.

Izzet Signet

Faithless Looting

Draw two cards, then discard two cards.
Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Eruth, Tormented Prophet

If you would draw a card, exile the top two cards of your library instead. You may play those cards this turn.