Mirror Image

You may have this creature enter as a copy of a creature you control.

Mistcaller

Sacrifice this creature: Until end of turn, if a nontoken creature would enter and it wasn't cast, exile it instead.

Mystic Archaeologist

Omenspeaker

When this creature enters, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Omniscience

You may cast spells from your hand without paying their mana costs.

One with the Machine

Draw cards equal to the greatest mana value among artifacts you control.

Patient Rebuilding

At the beginning of your upkeep, target opponent mills three cards, then you draw a card for each land card put into their graveyard this way.

Psychic Corrosion

Whenever you draw a card, each opponent mills two cards.

Sai, Master Thopterist

Thopter

Whenever you cast an artifact spell, create a 1/1 colorless Thopter artifact creature token with flying.
{1}{U}, Sacrifice two artifacts: Draw a card.

Angel of the Dawn

Flying
When this creature enters, creatures you control get +1/+1 and gain vigilance until end of turn.

Salvager of Secrets

When this creature enters, return target instant or sorcery card from your graveyard to your hand.

Scholar of Stars

When this creature enters, if you control an artifact, draw a card.

Sift

Skilled Animator

When this creature enters, target artifact you control becomes an artifact creature with base power and toughness 5/5 for as long as this creature remains on the battlefield.

Sleep

Tap all creatures target player controls. Those creatures don't untap during that player's next untap step.

Snapping Drake

Flying (This creature can't be blocked except by creatures with flying or reach.)

Core Set 2019