pokemon card gumshoos sm1] GX 064/060〈SR〉 Evolves from Yungoos Amazon.com: Gumshoos GX - 157/149

Its designed to be a friendly alternative to more competitive Pokmon titles like Pokmon TCG Live, the popular free-to-play Pokmon Unite

At the beginning of the next end step, sacrifice it

Shiva's abilities develop until the end of turn three, when its owner has to sacrifice it

While not a dealbreaker if youre grabbing a land or a mana rock, the more significance your card has to the current board state, the more of a problem showing it off becomes

It works simply because all necroskitter cares about is that a creature had a -1/-1 counter on it when it went to the grave

Since it's an instant, you simply pass your turn, wait until your opponent's upkeep, and then cast it, which is very close to getting an extra turn (the main difference is that your opponent will get to untap)