mtg ghost cards Vacuum - Single Card Whenever a Horror you control deals combat damage to a player Ghost Lantern | Commander Legends:

Often the Auras will see play in decks that care about enchantments, while the others are popular inclusions in Landfall decks that care about lands entering the battlefield

If the space two spaces higher than this creature's power on the Monk Track is already occupied (or, in rare cases, if its power is so high that there is no such space), this creature can occupy any lower-valued space on the Monk Track

Maybe Izzet Equipment will be a thing, but gosh I hope not

Spellslinging and control decks will appreciate the extra ramp provided by this 2-mana artifact

However, another complaint with that set is that it wasn't very flavorful

So that means triggering your Hedron Crab also triggers this homarid mercenary, as would targeting them with something like Glimpse the Unthinkable