Jhoira's Familiar

Flying
Historic spells you cast cost {1} less to cast. (Artifacts, legendaries, and Sagas are historic.)

Relic Runner

Relic Runner can't be blocked if you've cast a historic spell this turn. (Artifacts, legendaries, and Sagas are historic.)

Serra Angel

Flying
Vigilance (Attacking doesn't cause this creature to tap.)

Teferi, Timebender

+2: Untap up to one target artifact or creature.
−3: You gain 2 life and draw two cards.
−9: Take an extra turn after this one.

Plains

Niambi, Faithful Healer

When Niambi, Faithful Healer enters, you may search your library and/or graveyard for a card named Teferi, Timebender, reveal it, and put it into your hand. If you search your library this way, shuffle.

Gideon's Reproach

Gideon's Reproach deals 4 damage to target attacking or blocking creature.

Befuddle

Target creature gets -4/-0 until end of turn.
Draw a card.

Meandering River

Meandering River enters tapped.
{T}: Add {W} or {U}.

Temporal Machinations

Return target creature to its owner's hand. If you control an artifact, draw a card.

Sparring Construct

When Sparring Construct dies, put a +1/+1 counter on target creature you control.

Knight of New Benalia

Divination

Zahid, Djinn of the Lamp

You may pay {3}{U} and tap an untapped artifact you control rather than pay this spell's mana cost.
Flying

Tetsuko Umezawa, Fugitive

Creatures you control with power or toughness 1 or less can't be blocked.

Island

Aesthir Glider

Juggernaut

This creature attacks each combat if able.
This creature can't be blocked by Walls.

Daring Archaeologist

When Daring Archaeologist enters, you may return target artifact card from your graveyard to your hand.
Whenever you cast a historic spell, put a +1/+1 counter on Daring Archaeologist. (Artifacts, legendaries, and Sagas are historic.)