Ninja of the Deep Hours

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Ninja of the Deep Hours deals combat damage to a player, you may draw a card.

Kor Skyfisher

Flying
When Kor Skyfisher enters the battlefield, return a permanent you control to its owner’s hand.

Sparkspitter

, , Discard a card: Create a 3/1 red Elemental creature token named Spark Elemental. It has trample, haste, and “At the beginning of the end step, sacrifice Spark Elemental.”

Countless Gears Renegade

Revolt — When Countless Gears Renegade enters the battlefield, if a permanent you controlled left the battlefield this turn, create a 1/1 colorless Servo artifact creature token.

Gelectrode

: Gelectrode deals 1 damage to any target.
Whenever you cast an instant or sorcery spell, you may untap Gelectrode.

Pilgrim’s Eye

Flying
When Pilgrim’s Eye enters the battlefield, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle your library.

Snapping Sailback

Flash
Enrage — Whenever Snapping Sailback is dealt damage, put a +1/+1 counter on it. (It must survive the damage to get the counter.)

Lotus-Eye Mystics

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
When Lotus-Eye Mystics enters the battlefield, return target enchantment card from your graveyard to your hand.

Sudden Demise

Choose a color. Sudden Demise deals X damage to each creature of the chosen color.

Grotesque Mutation

Target creature gets +3/+1 and gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.)

Knight of Old Benalia

Suspend 5— (Rather than cast this card from your hand, you may pay and exile it with five time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost. It has haste.)
When Knight of Old Benalia enters the battlefield, other creatures you control get +1/+1 until end of turn.

Sigil of Valor

Whenever equipped creature attacks alone, it gets +1/+1 until end of turn for each other creature you control.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Regrowth

Return target card from your graveyard to your hand.

Mizzix’s Mastery

Exile target card that’s an instant or sorcery from your graveyard. For each card exiled this way, copy it, and you may cast the copy without paying its mana cost. Exile Mizzix’s Mastery.
Overload (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of “target” with “each.”)

Solemn Simulacrum

When Solemn Simulacrum enters the battlefield, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle your library.
When Solemn Simulacrum dies, you may draw a card.

Weldfast Wingsmith

Whenever an artifact enters the battlefield under your control, Weldfast Wingsmith gains flying until end of turn.

Rhet-Crop Spearmaster

You may exert Rhet-Crop Spearmaster as it attacks. When you do, it gets +1/+0 and gains first strike until end of turn. (An exerted creature won’t untap during your next untap step.)

Belligerent Brontodon

Each creature you control assigns combat damage equal to its toughness rather than its power.

Earthen Arms

Put two +1/+1 counters on target permanent.
Awaken 4— (If you cast this spell for , also put four +1/+1 counters on target land you control and it becomes a 0/0 Elemental creature with haste. It’s still a land.)

Direct Current

Direct Current deals 2 damage to any target.
Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

Dream Twist

Target player mills three cards.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Opt

Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)
Draw a card.