mtg m19 booster box Magic: The Gathering Core Set 2019 (M19) Deck Builders Toolkit | 4 Pack + 125 Cards the core of the Phyrexian armada March of the Machine Set

This ensures

Morphtronic Boomboxen X EARTH Level 4 [ MachineEffect ] ATK 1200 DEF 400 While in Attack Position, this card can attack twice during each Battle Phase

For example, on a $5 card, a grading fee is bigger than the overall selling price, which guarantees a loss, while on a genuine chase card, the same fee can pay for itself many times over

Ability Lock There are two types of Ability lock we are concerned about

Tier: C Derevi, Empyrial TacticianDerevi, Empyrial Tactician Derevi is a commander with a very small percentage of Merfolk decks, but she's on this list because those decks are really cool

Every last one of the above creatures were good in limited, so having a creature which kills them all (and flanks itself to boot) would be considered gravy on the boat