You can discard cards that are useful to have in the graveyard, or you might have other permanents around that generate their own triggers off the activation
They gain control of this artifact
The long-standing bug that massively buffed Mistrise Village, for example, has only just been fixed
One to play and two to equip for Death touch and an attacks alone trigger is kind of an okay deal, especially because those two things pair so well together
Like most Magic: The Gathering cards, the value of Ominous Cemetery depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Doctor Who)
MSRP for the base MTG Final Fantasy preconstructed decks are $69.99