This MTG combo is what got Walking Ballista banned in Pioneer, but you can still pull it off in MTG Modern games or in Commander
Let's look at an example: Invasion of Fiora is a Battle -- when you cast it, you place it in front of an opponent, who must now protect the battle
Look for the Move cost on the Location card and exert that number of cards in your Inkwell
(Scryfall note) To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as an evoke cost), add any cost increases, then apply any cost reductions
Whenever Overclocked Electromancer attacks, double its power until end of turn
With the millability of other cards like Dread Summons or Gisa and Geralf, a strong combo can be created to destroy creatures indirectly