Vampires, merfolk, dinosaurs, and pirates were the frontrunners in the original Ixalan block, but LCI uses them more as a supporting cast for its exploration and spelunking themes instead of having them as the main focus
For each card type among noncreature spells you've cast this turn, you may put a card of that type from among the revealed cards into your hand
Copy Cat - The Many Ways Mewtwo Struck Back - This old fan site, a relic of a more personal internet, is a brief summary of various different releases of Pokmon: The First Movie
Usually the way to get a +1/+1 counter on a non-creature is to animate it and put one on then wait for the animating effect to go away
Even if this is going to make an opponent discard their whole hand, the fact that it triggers on your upkeep means that, short of you having a Time Walk of some kind, youre going to play this and then your opponent(s) have a whole turn to deploy the best cards in their hand so that it wont hit them too badly