Of the four, three were quite valuable cards, with Dockside Extortionist going for around $90 before the ban (now $20-30 and bound to go lower), Jeweled Lotus for around $100 (now around $40 and bound to go lower), and Mana Crypt for around $190-200 (now around $70 and likely to go lower)
We've already noted that this card can be used in a life-drain infinite combo when paired with another card that triggers upon life-gain
Cards like "Gravekeeper's Inscription", "Shadow-Imprisoning Mirror" and "Soul Drain" can prevent their advantage-generating or recovery effects that activate in the GY (or negate said effects), slowing down their strategy.
See other cards revealed from the upcoming SV5K Wild Force and SV5M Cyber Judge: Heros Cape ACE SPEC Revealed from SV5M Cyber Judge
You cant always control these win conditions though, so theyre more just things to watch out for just as easily as you can win by one of these, you can lose by them, too