When discarded by a card effect, he can target and destroy a card the opponent controls, but if the opponent discarded it it can also look at one of the opponents cards randomly, and special summon it to their field if its a monster
The idea behind jumpstart is to make deckbuilding easier as you can combine any two booster packs into a 40-card deck
Its interesting that this card can spread the counters around, and it works very well with proliferate, not just the -1/-1 counters but also its own counters
Its also worth noting that unlike Creature Swap (a similar card that allows you to swap any of your Monsters for an opponents), Creature Seizure doesnt prevent you from changing the battle position of the Monster your opponent gives you
I made an FFXIV Hero Token card template based on the Final Fantasy x Magic the Gathering collab
Some spot removal (such as Beast Within and Hurl Through Hell , which totally sounds like a command throw to me) have also been included here