mtg card value database Then and Now, Part 1 A Deeper Quest For Magic:

He turns all black mana into Phyrexian mana, allowing you to cast huge creatures in exchange for life

Undying, on the other hand, sees that the creature has a +1/+1 counter and doesnt trigger since the creature doesnt meet its restrictions

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This Commander Legends commander deck contains: A deck of 100 black-bordered cards, including three previously unreleased cards

If you need something specific, Rune-Scarred Demon lets you tutor up any card you want when it comes into play, making it a fantastic target for Shadowborn Apostle.

Adventurer's Airship flies and has a relevant ability, but its a poor imitation of Smuggler's Copter and I dont think itll be that playable (unlike the original)