When Dream Catcher enters, return target exiled card with flashback you own to your hand.

Flash
When Tempo Arbiter enters, up to one target creature gets -X/-0 until end of turn, where X is the number of artifacts you control.

As an additional cost to cast artifact spells, you may pay {2}. When you do, each opponent sacrifices an untapped creature.

You may cast this spell without paying its mana cost if your devotion to black is four or greater.
Deathtouch
Whenever Chrolcatos deals combat damage to player, you draw a card and you lose 1 life.

At the beginning of your end step, if you control three or more untapped lands, you draw a card and you lose 1 life.

Menace
When Ardent Voter enters, make a pledge.

Flying
Whenever you cast a spell that targets a single creature you control, bless that creature.

When Rano's Slopeguard enters, you may exile cards from the top of your library until you exile a nonland card with mana value 2 or less, then put the rest on the bottom in a random order. You may cast the exiled card this turn.

Haste
Whenever you cast a spell that targets Rathomar Raider, target creature can't block this turn.

Haste
When Wildfang Cavalier dies, create a 3/1 red Dinosaur creature token. It gains haste until end of turn. If it's your combat phase, there is an additional combat phase after this phase.

Ward {1}
Whenever Morbid Bloomer deals combat damage, you may pay {1}. When you do, return up to one other target permanent card from your graveyard to your hand.

When Rotroot Hauler enters, mill three cards, then you may put a permanent card in your graveyard on top of your library.

As long as Undeniable Groove has power 4 or greater, it must be blocked if able.

Whenever Phenax or another Rogue you control deals damage to a player or planeswalker, each player mills two cards.
{1}{U}{B}, Exile five other cards from your graveyard: Return Phenax from your graveyard to the battlefield transformed. Activate only as a sorcery.

Flying
If a source would deal 2 or more damage to Fragile Soul, prevent that damage.

When Exemplar of Grit dies while attacking, return it to the battlefield tapped under its owner's control with a defender counter on it.
When Exemplar of Grit dies while blocking, return it to the battlefield tapped under its owner's control with a decayed counter on it.

First strike
When Chosen of Heliod enters, bless target creature.
{4}{W}{W}: Bless target creature you control. Activate only as a sorcery.

Once each turn, when another artifact you control enters, you may tap or untap target creature.

When Generous Farmer enters, create a Berry token.
Whenever you sacrifice a Berry, create a 1/1 green Plant creature token.

Whenever another creature you control enters, you gain 2 life.

Whenever Radiant Chromate or another Advisor you control enters, an opponent may pay {1}. If they do, scry 1. Otherwise, put a +1/+1 counter on that creature.

Whenever Rogue Justiciar becomes the target of a spell or ability you control, you may tap target creature. This ability triggers only once each turn.

Vigilance
When Seasoned Spymaster enters, teach target creature vigilance.

Flying
When Warcast Seraph enters, put a +1/+1 counter on each other artifact creature you control.

Flying
Whenever Aqueous Drake deals combat damage to a player, scry 1.