Mavren Fein, Dusk Apostle

Menace, deathtouch When this creature enters, each player loses a third of their life, rounded up.

Whenever an opponent discards a card, that player loses 2 life. Raid — At the beginning of your end step, if you attacked this turn, target opponent discards a card.

As this artifact enters, look at an opponent's hand, then choose any card name. Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.

At the beginning of your upkeep, exile the top card of your library. If it's a nonland card, you may cast that card this turn. Whenever you cast your third spell in a turn, you may transform Vance's Blasting Cannons.

When this creature enters, it deals 3 damage to target opponent or planeswalker and 3 damage to up to one target creature.

Repeating Barrage deals 3 damage to any target. Raid — 3RR: Return this card from your graveyard to your hand. Activate only if you attacked this turn.

Spells your opponents cast that target a Merfolk you control cost 2 more to cast. Abilities your opponents activate that target a Merfolk you control cost 2 more to activate.

Whenever this creature enters or attacks, you may exile target card from a graveyard. If a creature card is exiled this way, you gain 2 life. If a noncreature card is exiled this way, this creature gets +1/+1 until end of turn.