Toss in a few creatures like Writhing Necromass and Huskburster Swarm that you can cast for substantially less than their mana value, and you have the start to an interesting deck
However, that high cost has a large payoff
We already knew that this was a heist (I mean, it's in the name!), and with the stream we saw some more new cards
The best ones are once again going to be removal spells like Overkill, Cloud of Darkness, and Lightning Bolt
Limit Break is all about getting your creatures to 7 power to trigger additional effects from Cloud or Tifa, while minimizing equip costs to allow you to switch gear and keep opponents guessing
Individual packs or boxes that are still easy to find from this era can still sell for thousands of dollars though, so this is not an investment area for the faint of heart