Unlike future archetypes and sub-type cards, Spirit monsters are just a bunch of cards that share an ability without any real interplay with each other
When this card is activated: If your opponent controls a face-down monster, flip all monsters they control face-up
These cards are an homage to the timeshifted cards in the original Time Spiral set pre- Mirrodin -era cards reprinted with a new hourglass expansion symbol
So, if youve been holding on to this card since you were a kid, lets hope you kept it in a top loader because its selling for well over $300 in near mint condition
Personally I've been including at least five Trainer cards in each deck I've been running as I like having access to the extra bonuses they offer, but you're free to add as many or as little as you like
You can counter a spell that has the Cascade keyword, but the Cascade effect still triggers