Not sure if the comparison with Predatory Drive makes much sense here because Serpent Traps main purpose should still be it's destroy the highest Enemy Card after a special Card is played skill which is a very powerful effect and comparable to all the other expensive high removal Cards which sometimes also can brick and that the spring option was only added to remove the possibility that the Card becomes a complete brick if the opponent doesn't use a Special Card, so I don't think it was really intended to turn it in to another round start Scorch like PD, Blizzard or Manticore +OH Charge which even ends up making it easier to go for "weaker skill" (which additionally is 2 times repeatable with Iorveth and Hattori) in a lot of match ups than to go for the actual strong "main" skill of the Card.
I think the spring option should be changed to Spring: if the opponent controls at least 2 Units destroy the lowest enemy Unit because usually tall removal Card's like this come with a certain risk.
I think the spring option should be changed to Spring: if the opponent controls at least 2 Units destroy the lowest enemy Unit because usually tall removal Card's like this come with a certain risk.