Abaddon the Despoiler

Flying My Will Be Done — Whenever Szarekh attacks, mill three cards. You may put an artifact creature card or Vehicle card from among the cards milled this way into your hand.

(T: Add B.)

(T: Add R.)

T: Add C. T: Add U or B. This artifact deals 1 damage to you.

Vigilance Unquestionable Wisdom — Other creatures you control get +1/+0 and have vigilance. Hunt for Heresy — 1, T: Tap target creature an opponent controls. Investigate. (Create a Clue token. It's an artifact with "2, Sacrifice this token: Draw a card.")

Rapid Regeneration — The Swarmlord enters with two +1/+1 counters on it for each time you've cast your commander from the command zone this game. Xenos Cunning — Whenever a creature you control with a counter on it dies, draw a card.

Phaeron — Whenever one or more artifact cards leave your graveyard, create two 2/2 black Necron Warrior artifact creature tokens. Grand Strategist — At the beginning of combat on your turn, another target artifact creature you control gets +2/+2 and gains menace until end of turn.

Flying Prince of Chaos — When Be'lakor enters, you draw X cards and you lose X life, where X is the number of Demons you control. Lord of Torment — Whenever another Demon you control enters, it deals damage equal to its power to any target.